Nera Interlink Technical Description

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4 - 11 GHz

InterLink



The information in this documentation is subject to change without notice and describes only the product defined in

the introduction of this documentation. This documentation is intended for the use of Nera's customers only for the

purposes of the agreement under which the documentation is submitted, and no part of it may be reproduced or

transmitted in any form or means without the prior written permission of Nera.

The information or statements given in this documentation concerning the suitability, capacity, or performance of thementioned hardware or software products cannot be considered binding but shall be defined in the agreement made

between Nera and the customer. However, Nera has made all reasonable efforts to ensure that the instructions

contained in the documentation are adequate and free of material errors and omissions. Nera will, if necessary,

explain issues that may not be covered by the documentation. Nera's liability for any errors in the documentation is

limited to the documentary correction of errors.

NERA WILL NOT BE RESPONSIBLE IN ANY EVENT FOR ERRORS IN THIS DOCUMENTATION OR FOR ANY

DAMAGES, INCIDENTAL OR CONSEQUENTIAL (INCLUDING MONETARY LOSSES), that might arise from the

use of this documentation or the information in it. This documentation and the product it describes are considered

protected by copyright according to the applicable laws.

NERA logo is a registered trademark of Nera ASA. Other product names mentioned in this documentation may be

trademarks of their respective companies, and they are mentioned for identification purposes only.

Hereby, Nera Networks AS, declares that Nera InterLink Microwave Radio Family is in compliance with the essential

requirements and other relevant provisions of Directive: 1999/5/EC.

The product is marked with the CE marking and Notified Body number according to the Directive 1999/5/EC.

Copyright © Nera 2002. All rights reserved.



INTERLINK Doc.no: NL2000\00206 Rev. B, 2003.01.31

2

Document history

Revision Date Summary of changes

Rev A 14.09.2001 First Issue

Rev B 31.01.2003 ANSI Frequency plans and references included3x34/45 Mb/s Multiplexer included



INTERLINKDoc.no: NL2000\00206 Rev. B, 2003.01.31

3

ContentsPage

1. INTRODUCTION ................................................................ ........................................................... ................... 7

1.1 R EFERENCES .................................................................................................................................................7 1.2 TERMINOLOGY..............................................................................................................................................8

2. NETWORK AND SYSTEM OVERVIEW ............................................................. ....................................... 10

3. EQUIPMENT MAIN CHARACTERISTICS................................................................................................15

3.1 ITU-R/CEPT FREQUENCY BANDS AND CHANNEL ARRANGEMENTS............................................................15 3.2 EQUIPMENT SPECIFICATIONS ETSI........................................................... .................................................. 16 3.3 ANSI - TECHNICAL R EQUIREMENTS .........................................................................................................16 3.4 SYSTEM CONFIGURATIONS..........................................................................................................................17

3.4.1 Hot Standby ...................................................... ........................................................... .......................... 17 3.4.2 Terminal configurations ............................................................. ........................................................... 17 3.4.3 Modes of operation................ ................................................................ ................................................ 17 3.4.4 Radio channel identification..................... ...................................................................... ....................... 17

3.5 SYSTEM LOOP BACK POSSIBILITIES..............................................................................................................18 3.6 SAFETY CONDITIONS...................................................................................................................................18 3.7 E NVIRONMENTAL CONDITIONS ...................................................................................................................18 3.8 ELECTROMAGNETIC COMPATIBILITY CONDITIONS (EMC) ................................................................ .........18 3.9 EQUIPMENT TYPE APPROVAL ......................................................................................................................18 3.10 MECHANICAL CHARACTERISTICS ................................................................................................................18 3.11 CONTROL AND SUPERVISION FACILITIES.....................................................................................................19 3.12 POWER SUPPLY ...........................................................................................................................................19

3.12.1 System power consumption ........................................................... .................................................... 19 3.13 SYSTEM PERFORMANCE ..............................................................................................................................20

3.13.1 Equipment background BER (Residual BER) ................................................................... ................20 3.13.2 BER as a function of receiver input level................. ................................................................ .........20 3.13.3 System gain .......................................................................................................................................21

3.13.4 System signature / distortion sensitivity ................................................................ ............................ 21 3.13.5 System delay......................................................................................................................................22

3.14 I NTERFERENCE SENSITIVITY........................................................................................................................22 3.14.1 Co-channel interference sensitivity...................................................................................................22 3.14.2 Adjacent channel interference sensitivity.............................................................. ............................ 22 3.14.3 Threshold to Interference sensitivity (T/I).........................................................................................23

3.15 MEAN TIME BETWEEN FAILURE (MTBF)............................................................ ....................................... 23

4. SYSTEM CHARACTERISTICS FOR SPACE DIVERSITY (SD).............................................................24

4.1 GENERAL ....................................................................................................................................................24 4.2 COMBINING PRINCIPLES AND PERFORMANCE ..............................................................................................24

5. WAVEGUIDE AND BRANCHING........................................................ ....................................................... 25

5.1 WAVE GUIDE FLANGES ...............................................................................................................................25 5.2 BRANCHING LOSS .......................................................................................................................................25 5.3 BRANCHING AND RF-FILTERING CHARACTERISTICS ...................................................................................25 5.4 RF-INPUT RETURN LOSS ..............................................................................................................................26

6. TRANSMITTER CHARACTERISTICS.......................................................................................................27

6.1 TRANSMITTER OUTPUT CHARACTERISTICS..................................................................................................27 6.1.1 Output power.........................................................................................................................................27 6.1.2 Automatic Transmitter Power Control (ATPC)....................................................................... .............. 27 6.1.3 Manual Transmitter Power Control (MTPC)...................................... .................................................. 27 6.1.4 TX-oscillator frequency stability .................................................................. ......................................... 27 6.1.5 Spurious emissions ............................................................. ........................................................... ........28

6.2 TRANSCEIVER MONITORING FACILITIES ......................................................................................................28 6.3 TRANSCEIVER ALARMS ...............................................................................................................................28

7. RECEIVER CHARACTERISTICS .......................................................... ..................................................... 29




4

7.1 R ECEIVER INPUT CHARACTERISTICS............................................................................................................29 7.1.1 Local Rx-oscillator tolerance and stability ............................................................ ............................... 29 7.1.2 Receiver image rejection .............................................................. ......................................................... 29 7.1.3 Spurious emissions ............................................................. ........................................................... ........29 7.1.4 Noise figures............ ........................................................... ............................................................ .......29

8. MODEM CHARACTERISTICS......................................................... ........................................................... 30

8.1 MODULATOR ..............................................................................................................................................30 8.2 DEMODULATOR ..........................................................................................................................................30

8.2.1 Adaptive Time Domain Equalizer (ATDE)....................................................................... ..................... 30

9. BASEBAND CHARACTERISTICS...............................................................................................................31

9.1 GENERAL ....................................................................................................................................................31 9.2 TRANSMISSION INTERFACES .......................................................................................................................31

9.2.1 Transmission interface characteristics - STM-1 electrical....................................................................31 9.2.2 Transmission interface characteristics - STM-1/OC-3 optical – Intermediate Reach .......................... 31 9.2.3 Transmission interface characteristics – STM-1/OC-3 optical – Short Reach ..................................... 31 9.2.4 Transmission interface characteristics – 3x34 Mb/s (3xE3)............................................................ .....32 9.2.5 Transmission interface characteristics – 3x45 Mb/s (3xDS3)...............................................................32

9.3 3XE3/DS3 I NTERFACE BOARD ...................................................................................................................32 9.4 SCRAMBLING/DESCRAMBLING FUNCTIONS .................................................................................................32 9.5 SECTION/TRANSPORT OVER HEAD (SOH/TOH) ................................................... ...................................... 33

9.5.1 Frameword and parity bytes ............................................................................................ ..................... 33 9.5.2 Media specific bytes ........................................................................................... ................................... 33 9.5.3 Other SOH/TOH-bytes ................................................................ .......................................................... 33 9.5.4 DS1/E1 wayside traffic .............................................................. ............................................................ 34 9.5.5 64 kb/s channels ....................................................................................................................................34

9.6 SPECIFICATIONS OF JITTER AND WANDER ....................................................................................................34 9.6.1 STM-1/OC-3 traffic interface ....................................................... ......................................................... 34 9.6.2 E3 (34 Mb/s) traffic interface....................................................... ......................................................... 34 9.6.3 DS3 (45 Mb/s) traffic interface.......................................................................... .................................... 34 9.6.4 E1 (2.048 Mb/s) wayside interface........................................................... ............................................. 34 9.6.5 DS1 (1.544 Mb/s) wayside interface............................................................................................... .......34

10. SERVICE AND WAYSIDE TRAFFIC......................................................................................................34

10.1 GENERAL ....................................................................................................................................................34 10.2 SERVICE TRAFFIC........................................................................................................................................35

10.2.1 Service telephones.............................................................................................................................35 10.2.2 PABX-connection:..................................................... ................................................................ ........36 10.2.3 64 kb/s service channels....................................................................................................................36

10.3 WAYSIDE TRAFFIC ......................................................................................................................................36 10.3.1 DS1 (1.544 Mb/s) wayside interface .................................................................. ............................... 36 10.3.2 E1 (2.048 Mb/s) wayside interface............................................................................. ....................... 36

11. RADIO PROTECTION SWITCHING (RPS)...........................................................................................37

11.1 GENERAL ....................................................................................................................................................37 11.2 BASE BAND SWITCHING OPERATIONS ..........................................................................................................37 11.3 SWITCHING CAPABILITY..............................................................................................................................37 11.4 PRIORITY OF PROTECTION SWITCHING ........................................................................................................37 11.5 SPECIFICATION OF THE PROTECTION SWITCHING SYSTEM ...........................................................................37

11.5.1 Alignment specification....... ................................................................ .............................................. 37 11.5.2 Switching criteria..............................................................................................................................37 11.5.3 Switching operation time...................................................................................................................38

12. SYSTEM SUPERVISORY CHARACTERISTICS......................................................... ......................... 38

12.1 GENERAL ....................................................................................................................................................38 12.2 EVENT LOGGING .........................................................................................................................................39

12.3 MONITORING OF SYSTEM PERFORMANCE ....................................................................................................39 12.3.1 Parity error monitoring...................................................................................... ............................... 39 12.3.2 System performance calculations......................................................................................................39




6

Table 6-1 Nominal output power ................................................................................................................27 Table 7-1 Noise figure ................................................................................................................................29 Table 9-1: Utilization of SOH/TOH-bytes;.................................................................................................33 Table 11-1 Switching operation time..........................................................................................................38 Table 12-1 System performance data..........................................................................................................39

Appendix Page

APPENDIX 1 CHANNEL FREQUENCIES ................................................................. ...................................... 46




7

1. INTRODUCTION

InterLink is a scalable indoor mounted radio-relay equipment for transmission of N x 155 Mb/s in the

frequency bands 4 - 11 GHz with details as specified in chapter 3.1and 3.3.

Line interfaces for the equipment includes STM-1/OC-3, 3 x E3/DS-3, and E1/DS1 wayside.

1.1 References

Document code: Title/Description:

ETSI EN 301 489-4 V1.2.1 (2000-08) Electromagnetic compatibility and Radio spectrum Matters (ERM); ElectroMagnetic

Compatibility (EMC) standard for radio equipment and services; Part 4: Specific conditions for

fixed radio links and ancillary equipment and services. For grade B equipment

ETSI ETS 300 019-1-1 ed.1 (1992-02) Classification of environmental conditions; Storage. Class 1.2, weather protected

ETSI ETS 300 019-1-2 ed.1 (1992-02) Classification of environmental conditions; Transportation. Class 2.3, public transportation

ETSI ETS 300 019-1-3 ed.1 (1992-02) Classification of environmental conditions; Stationary use at weather protected locations. Class

3.2, partly temperature controlled locations

ETSI ETS 300 019-1-4 ed.1 (1992-02) Classification of environmental conditions; Stationary use at non-weather protected locations

ETSI EN 300 234 V1.2.1 (1998-10)ETSI EN 300 234 V1.3.1 (2001-02) High capacity DRRS carrying 1 x STM-1 signals and operating in frequency bands with about 30MHz channel spacing and alternated arrangements

ETSI EN 301 127 V1.1.1 (2000-09)

ETSI EN 301 127 V1.2.1 (2001-06)

High capacity digital radio systems carrying SDH signals (up to 2 x STM-1) in frequency bands

with about 30 MHz channel spacing and using Co-polar arrangements or Co-Channel Dual

Polarized (CCDP) operation

ETSI EN 301 461V1.1.1 (2000-09)

ETSI EN 301 461V1.2.1 (2001-02)

ETSI EN 301 461V1.3.1 (2002-07)

High capacity fixed radio systems carrying SDH signals (2 x STM-1) in frequency bands with 40

MHz channel spacing and using Co-channel Dual Polarized (CCPD) operation

CENELEC EN 60950: 2000 Safety of information technology equipment

CENELEC EN 60215: 1989 Safety requirements for radio transmitting equipment

CENELEC EN 60825-1 1994 Safety of laser products, Part 1: Equipment classification, requirements and user’s guide

CENELEC EN 60825-2 2000 Safety of laser products, Part 2: Safety of optical fiber communication systems

ITU-R Rec. F.382-7 (1997-09) Radio-frequency channel arrangements for radio-relay systems operating in the 2 and 4 GHz

bands

ITU-R Rec. F.635-6 (2001) Radio-frequency channel arr. based on a homogenous pattern for radio-relay systems operating in

the 4 GHz bandITU-R Rec. F.746-5 (2001) Radio-frequency channel arrangements for radio-relay systems

ITU-R Rec. F.1099-3 (1999-02) Radio-frequency channel arr. for high-capacity digital radio-relay systems in the 5 GHz (4400 -

5000 MHz) band

ITU-R Rec. F.383-7 (2001) Radio-frequency channel arrangements for high capacity radio-relay systems operating in the

lower 6 GHz band

ITU-R Rec. F.384-7 (1999-02) Radio-frequency channel arrangements for medium and high capacity analogue or digital radio-

relay systems operating in the upper 6 GHz band

ITU-R Rec. F.385-7 (2001) Radio-frequency channel arrangements for radio-relay systems operating in the 7 GHz band

ITU-R Rec. F.386-6 (1999-02) Radio-frequency channel arrangements for medium and high capacity analogue or digital radio-

relay systems operating in the 8 GHz band

ITU-R Rec. F.387-8 (1999-02) Radio-frequency channel arrangements for radio-relay systems operating in the 11 GHz band

ITU-R Rec. F.750-4 (2000-05) Architectures and functional aspects of radio-relay systems for synchronous digital hierarchy

(SDH)-based network

ITU-R Rec. F.1191-1 (1997-09) Bandwidths and unwanted emissions of digital radio-relay systems

ITU-R Rec. SM.329-8 (2000-04) Spurious emissionsITU-T Rec. G.703 (10/98) Physical/electrical characteristics of hierarchical digital interfaces

ITU-T Rec. G.707 (10/00) Network node interface for the synchronous digital hierarchy (SDH)

ITU-T Rec. G.711 (11/88) Pulse code modulation (PCM) of voice frequencies

ITU-T Rec. G.712 (11/96) Transmission performance characteristics of pulse code modulation channels

ITU-T Rec. G.783 (10/00) Characteristics of synchronous digital hierarchy (SDH) equipment functional blocks

ITU-T Rec. G.821 (08/96) Error performance of an international digital connection operating at a bit rate below the primary

rate and forming part of an integrated services digital network

ITU-T Rec. G.823 (03/00) The control of jitter and wander within digital networks which are based on the 2048 kbit/s

hierarchy

ITU-T Rec. G.824 (03/00) The control of jitter and wander within digital networks which are based on the 1544 kbit/s

hierarchy

ITU-T Rec. G.826 (02/99) Error performance parameters and objectives for international, constant bit rate digital paths at or

above the primary rate

ITU-T Rec. G.957 (06/99) Optical interfaces for equipments and systems relating to the synchronous digital hierarchy

ITU-T Rec. G.958 (11/94) Digital line systems based on the synchronous digital hierarchy for use on optical fiber cableITU-T Rec. Q.23 (11/88) Technical features of push-button telephone sets

ETSI TR 101 036-1 V1.2.1 (2000-01) Fixed Radio Systems; Point-to-point equipment; Generic wordings for standards on digital radio

systems characteristics; Part 1: General aspects and point-to-point equipment parameters




8

CEPT/ERC Rec. 74-01, distrib. B Spurious Emissions

CEPT/ERC Rec. 12-08 E Harmonized radio frequency channel arrangements and block allocations for low, medium and

high capacity systems in the band 3600 to 4200 MHz

CEPT/ECC Rec 02-06 Preferred channel arrangement for digital fixed service systems operating in the frequency range

7125-8500 MHz

CEPT/ERC Rec 14-01 E Radio-frequency channel arrangements for high capacity analogue and digital radio-relay systems

operating in the band 5925 MHz – 6425 MHz

CEPT/ERC Rec 14-02 E Radio-frequency channel arrangements for medium and high capacity digital radio-relay systems

operating in the band 6425 MHz – 7125 MHz

CEPT/ERC Rec. 12-06 E Harmonized radio frequency channel arrangements for digital terrestrial fixed systems operating in

the band 10.7 – 11.7 GHz

ANSI/Industry Canada:

Radio Frequency Channel Plans:

FCC 47 CFR Part 101 Fixed Microwave Services

SRSP – 305.9 Technical Requirements for Line-of-sight Radio Systems Operating in the Fixed Service in the

Band 5915 – 6425 MHz

SRSP – 306.4 Technical Requirements for Line-of-sight Radio Systems Operating in the Fixed Service in the

Band – 6425 – 6930 MHz

SRSP – 307.1 Technical Requirements for Fixed Line-of-Sight Radio Systems Operating in the Band 7125-7725

MHz

SRSP – 307.7 Technical Requirements for Fixed Line-of-sight Radio Systems Operating in the Band 7725-8275MHz

SRSP – 310.7 Technical Requirements for Fixed Line-of-sight Radio Systems Operating in the Band 10.7-11.7

GHz

Electromagnetic Compatibility:

FCC 47CFR Part 15 Radio Frequency Devices (EMC regulations)

Safety:

CAN/CSA 22.2 No. 60950-00 Safety – Information processing and business equipment

SONET:

ANSI Rec. T1.105 SONET - Basic Description including Multiplex Structure, Rates and Formats

ANSI Rec. T1.105.06-1996 Telecommunications-Synchronous Optical Network (SONET): Physical Layer Specifications

ANSI Rec. T1.646-1995 Broadband ISDN Physical Layer Specification for User Network Interfaces Including DS1/ATM

ANSI T1.102-1993 Digital Hierarchy – Electrical Interfaces”.

1.2 TerminologyAbbreviations Descriptions

ACAP Adjacent Channel Alternate Polarization

ACCP Adjacent Channel Co-Polarization

ACF Alarm and Control Function

ADM Add/Drop Multiplexer

AIS Alarm Indication Signal

APS Automatic Protection Switching

ASIC Application Specific Integrated Circuit

ATDE Adaptive Time Domain Equalizer

ATPC Automatic Transmitter Power Control

AU Administrative Unit

AUG Administrative Unit Group

AUI Attachment Unit Interface

BER Bit Error Rate

BIP Bit Interleaved Parity

C Container

CCDP Co-Channel Dual Polarized

CRC Cyclic Redundancy Check

DCC Data Communications Channel

ECC Embedded Control Channel

EMC ElectroMagnetic Compatibility

EW Early Warning

FIR Finite Impulse Response

HBER High Bit Error Rate

LBER Low Bit Error Rate

LCT Local Craft Terminal

LOF Loss Of Frame

LOH Line OverHead (LOH is a SONET term with same meaning as MSOH in SDH networks)

LOS Loss Of Signal

MLM Multi-Longitudinal Mode

MMF Multi-Mode Fiber

MS Multiplex SectionMSOH Multiplex Section OverHead (MSOH is a SDH term with same meaning as LOH in SONET networks)

MST Multiplex Section Termination

MTBF Mean Time Between Failure




9

NEW-NMS Nera Element vieW-Network Management System. A NERA proprietary radio-element and sub network management PC-program

NNI Network Node Interface

OOF Out Of Frame

OC-3 Optical Carrier – level 3 = 155Mbit/s (OC-1 – level 1 = 51.84 Mb/s)

PABX Private Automatic Branch eXchange

PCM Pulse Code Modulation

PDH Plesiochronous Digital Hierarchy

PLL Phase Locked Loop

POH Path OverHeadPRBS Pseudo Random Bit Sequence

PSK Phase Shift Keying

PUI Peripheral Unit Interface

RF Radio Frequency

RFID Radio Frequency Identification

RPS Radio Protection Switching

RRR Radio-Relay Regenerator

RRT Radio-Relay Terminal

RS Regenerator Section

RSL Receiver input Signal Level

RSOH Regenerator Section OverHead (RSOH is a SDH term with same meaning as SOH in SONET networks)

RST Regenerator Section Termination

SDH Synchronous Digital Hierarchy

SETS Synchronous Equipment Timing Source

SMF Single Mode Fiber

SNR Signal-to-noise ratio

SOH/TOH Section OverHead/Transport OverHead (SOH is used in SDH networks, TOH is used in SONET networks)

SONET Synchronous O ptical Network

SORP SDH/SONET Overhead & Radio Processor

SPE Synchronous Payload Envelope (An STS frame consist of Transport OverHead and the SPE)

STM-0 A subset of STM-1 (generally 51.84 Mb/s but may also be 55.296 Mb/s)

STM-1 Synchronous Transport Module -1 (1 represents the lowest defined data rate; 155.520 Mb/s)

STS-1Synchronous Transport Signal level 1 (Lowest level of the SONET hierarchy, higher levels are multiple of STS-1, OC-1 is the optically

equivalent counterpart for STS-1)

SU Supervisory Unit

SVCE SerVice ChannEl (used to define the voice channel circuit board)

TDM1 Tributary Data Mapper 1

TMN Telecommunication Management Network

TRIB1 Tributary Interface Block 1

TU Tributary Unit

TUG Tributary Unit Group

VC Virtual Container

XPI Cross Polar InterferenceXPIC Cross Polar Interference Canceller



I NT E RL I NK

D o c .n o: NL 2 0

0 0 \ 0 0 2 0 6 R ev .B ,2 0 0 3 . 0 1 . 3 1

1

1

Supervisory Board

1+1 TERMINAL

Interface Baseband Board

155.520 Mb/s

ServiceTelephone

4x64kb/sChannels

PABXAdapter function

SVCE Board

ACF

Auxiliary Services Board

ACF

ACF

LINEINTERFACE

MSOH Pros.

&Wayside

Splitter &

AlignmentSwitch

SORP-ASIC

ACF

SORP-ASICRSOH

Proces.

SORP-ASICRSOH

Proces.

64kb/s Channels

SVCE Telephoneext connections

External ControlsOutput

Output Alarms

SOH-ASICSOH

Adapter

Wayside

PABXConnections

AlarmAdapter function

Alarmout

function

ACF

Analoginput

function

Analog voltages

SUSVCE com.

InterLinkExternal Alarms

Input

F i g ur e 2 -2 Bl o c k d i a gr am f or a1 + 1 t e r mi n al




13

INTFC C

INPUT

OUTPUT

INTFC B

INPUT

OUTPUT

D

C

B

A

INTFC A

4

INTFC C

INPUT

OUTPUT

INTFC B

INPUT

OUTPUT

INTFC A

5

INTFC C

INPUT

OUTPUT

INTFC B

INPUT

OUTPUT

INTFCA

6

INTFC C

INPUT

OUTPUT

INTFC B

INPUT

OUTPUT

INTFCA

7

INTFC C

INPUT

OUTPUT

INTFC B

INPUT

OUTPUT

INTFC A

8

INTFC C

INPUT

OUTPUT

INTFC B

INPUT

OUTPUT

INTFCA

9

INTFC C

INPUT

OUTPUT

INTFC B

INPUT

OUTPUT

INTFC A

10

D

C

B

A

TRANSCEIVERPOWERCONNECTIONSTB2 TB3

IC1S1 J1 (EXT CON) J2 (SU TEST)

- GND + - GND + - GND + - GND +

ON

1 2

RMVRST

RMVRST

RMVRST

I N T E R F A C E B A S E B A N D

B D

M O D E M B D

M O D E M B D

S V C E B D

S U P E R V I S O R Y

B D

PWRON

OFF

PWRON

OFF

WARNING

POWER

TRANSCEIVER

WARNING

POWER

TRANSCEIVER

ALM

PWR

ALM ALM

PWR PWR

ALM ALM

PWR PWR

RMVRST

RMVRST

Figure 2-4 Subrack layout for a 1+1 terminal




14

2 1

INTFC C

INPUT

OUTPUT

INTFC B

INPUT

OUTPUT

D

C

B

A

INTFCA

4

INTFC C

INPUT

OUTPUT

INTFC B

INPUT

OUTPUT

INTFCA

5

INTFC C

INPUT

OUTPUT

INTFC B

INPUT

OUTPUT

INTFCA

6

INTFC C

INPUT

OUTPUT

INTFC B

INPUT

OUTPUT

INTFC A

7

INTFC C

INPUT

OUTPUT

INTFC B

INPUT

OUTPUT

INTFC A

8

INTFC C

INPUT

OUTPUT

INTFC B

INPUT

OUTPUT

INTFC A

9 0

3

TRANSCEIVERPOWERCONNECTIONSTB2 TB3

IC1S1 J1(EXTCON) J2(SU TEST)

- GND + - GND + - GND + - GND +

ON

1 2

RMV

RST

RMV

RST

A U X I L I A R Y S E R V I C E S B

D

RMV

RST

S V C E B D

RMV

RST

S U P E R V I S O R Y B D

PWR

ON

OFF

PWR

ON

OFF

INTFC C

INPUT

OUTPUT

INTFC B

INPUT

OUTPUT

INTFC A

21

D

C

B

A

INTFC C

INPUT

OUTPUT

INTFC B

INPUT

OUTPUT

INTFC A

10

INTFC C

INPUT

OUTPUT

INTFC B

INPUT

OUTPUT

INTFCA

11

INTFC C

INPUT

OUTPUT

INTFC B

INPUT

OUTPUT

INTFCA

12

INTFC C

INPUT

OUTPUT

INTFC B

INPUT

OUTPUT

INTFCA

13

INTFC C

INPUT

OUTPUT

INTFC B

INPUT

OUTPUT

INTFCA

14

INTFC C

INPUT

OUTPUT

INTFC B

INPUT

OUTPUT

INTFCA

15

INTFC C

INPUT

OUTPUT

INTFC B

INPUT

OUTPUT

INTFC A

16

INTFC C

INPUT

OUTPUT

INTFC B

INPUT

OUTPUT

INTFCA

17

INTFC C

INPUT

OUTPUT

INTFC B

INPUT

OUTPUT

INTFCA

18

INTFC C

INPUT

OUTPUT

INTFC B

INPUT

OUTPUT

INTFCA

19

INTFC C

INPUT

OUTPUT

INTFC B

INPUT

OUTPUT

INTFC A

20

RMV

RST

RMVRST

RMVRST


B D

RMVRST

RMV

RST

M O D E M B D

RMVRST


B D

RMVRST

WARNING

POWER

TRANSCEIVER

WARNING

POWER

TRANSCEIVER

WARNING

POWER

TRANSCEIVER

WARNING

POWER

TRANSCEIVER

M O D E M B D

M O D E M B D

M O D E M B D


B D

S V C E B D

Figure 2-5 Subrack layout for a 3+1 terminal




15

3. EQUIPMENT MAIN CHARACTERISTICS

3.1 ITU-R/CEPT Frequency bands and channel arrangements

The InterLink equipment is available in ITU-R/CEPT frequency bands according to the following table:

STM-1/3xE3

64TCM 128TCMNL-code

Frequency

range

[GHz]

ITU-R

Recommendation

Duplex

[MHz]

BW

[MHz]

Tx-Rx

min.

[MHz]

Duplex

[MHz]

BW

[MHz]

Tx-Rx

min.

[MHz]

3.8 – 4.2[I]: F.382-7

CEPT 12-08 E Annex B,1213 29 68

NL2004A

3.6 – 4.2[I]: F.635-6, Annex 1, 6

CEPT 12-08 E Annex A, 2320 30 80

[I]: F.635-6 Annex 1, 3 a 320 40 80NL2004B 3.6 – 4.2

CEPT 12-08 E Annex A, 1 320 40 80

NL2005A 4.4 – 5.0 F.746-5 Annex 2 312 28 60

NL2005B 4.4 – 5.0 F.1099-3 Annex 1, 1 300 40 60

NL2006A5.9 – 6.4

(L6)

[I]: F.383-7

[F]: § 101.147 Table (8)

CEPT 14-01 E

252.04 29.65 44.49

NL2006B6.4 – 7.1

(U6)

[I]: F.384-7

CEPT 14-02 E340 40 60

[I]: F.385-7 Annex 3,

lower part196 28 84

[I]: F.385-7 Rec. 1-4,

Arrangement #1161 28 77

CEPT 02-06 Annex 1 154 28 42

[I]: F.385-7 Rec. 1-4,


NL2007A 7.1 – 7.4

[I]: F.385-7 Rec. 1-4,

Arrangement #2 161 28 77[I]: F.385-7 Annex 1, 1

CEPT 02-06 Annex 1154 28 42

[I]: F.385-7 Annex 3,

upper part168 28 56

[I]: F.385-7 Annex 1, 4 182 28 70

[I]: F.385-7 Annex 1, 5 154 28 70

[I]: F.385-7 Rec. 1-4 161 28 49

[I]: F.385-7 Rec. 1-4,


NL2007B 7.4 – 7.7

[I]: F.385-7 Rec. 1-4,


NL2007C7.4 – 7.9

“UK”

F.385-7 Annex 4 245 28 49

[I]: F.386-6 Annex 1 311.32 29.65 103.77NL2008A 7.7 – 8.3

[I]: F.386-6 Annex 1, 4 311.32 29.65 103.77

[I]: F.386-6 Annex 4

OIRT-2266 28 70

NL2008B7.9 – 8.4

7.9 – 8.5CEPT 02-06 Annex 2 310 28 58

NL2008C 8.2 – 8.5Additional channel

arrangement #1154 28 42

[I]: F.387-8 Rec 1 530 40 90

[I]: F.387-8 Annex 1

CEPT 12-06 Rec. 1530 40 130

NL2011A 10.7 - 11.7

[I]: F.387-8 Annex 2

CEPT 12-06 Rec. 3490 40 ≥ 50

Table 3-1 Frequency bands ITU-R/CEPT

The exact arrangements of channel frequencies for each frequency band are shown in Appendix 1.




16

3.2 Equipment Specifications ETSI

Systems

Frequency

band

[GHz]

NL-code

BW

[MHz]

Polari-

zation Recommendations

ACAP EN 300 234 V1.2.1 & V1.3.1 Grade A and B NL2004A 29 / 30 CCDP EN 301 127 V1.1.1 & V1.2.1

ACAP EN 301 461 V1.3.1 Grade B4

NL2004B 40CCDP EN 301 461 V1.3.1 Grade B

ACAP EN 300 234 V1.2.1 & V1.3.1 Grade A and B NL2005A* 28

CCDP EN 301 127 V1.1.1 & V1.2.1

ACAP EN 301 461 V1.3.1 Grade B5

NL2005B 40CCDP EN 301 461 V1.3.1 Grade B

ACAP EN 300 234 V1.2.1 & V1.3.1 Grade A and BL6 NL2006A 29.65

CCDP EN 301 127 V1.1.1 & V1.2.1

ACAP EN 301 461 V1.3.1 Grade BU6 NL2006B 40

CCDP EN 301 461 V1.3.1 Grade B

ACAP EN 300 234 V1.2.1 & V1.3.1 Grade A and B7 NL2007A,-B & -C

28CCDP EN 301 127 V1.1.1 & V1.2.1

ACAP EN 300 234 V1.2.1 & V1.3.1 Grade A and B8

NL2008A,

-B & -C 28 / 29.65

CCDP EN 301 127 V1.1.1 & V1.2.1

ACAP EN 301 461 V1.3.1 Grade B11 NL2011A 40

CCDP EN 301 461 V1.3.1 Grade B

Table 3-2 Equipment specifications ETSI

Note * : The specified ETSI-recommendations are not formally defined for the 5 GHz band, but they are the most relevant

recommendations for this channel arrangement.

3.3 ANSI - Technical Requirements

The InterLink equipment conforms to FCC/CSA specifications as given in the following table

ANSI – Technical Specifications

3xDS-3/OC-3

NL-codeFrequency

range [GHz]

FCC/CSA

Specification Duplex

[MHz]

BW

[MHz]

Tx-Rx

min.

[MHz]

FCC 47CFR Part 101

F.plan 101.147 Table (i-8)

SRSP –305.9 group A

252.04 29.65 44.49 NL2006A 5.9 – 6.4 (L6)

SRSP –305.9 group B 252.04 29.65 44.49

NL2006C* 6.4 – 7.1 (U6) SRSP –306.4 100/340 30 40

NL2007A 7.1 – 7.4 SRSP –307.1 175 30 175 NL2007B 7.4 – 7.7 SRSP –307.1 150 30 150

NL2008A 7.7 – 8.3 SRSP –307.7 300 30 90

NL2008** 7.1 – 8.5 U.S. Gov - - -

NL2011A 10.7 – 11.7

FCC 47CFR Part 101

F.plan 101.147 Table (o-7)

SRSP –310.7

490 40 50

NL2011B 10.7 – 11.7

FCC 47CFR Part 101

F.plan 101.147 Table (o-6)

SRSP –310.7

490/500 30 50

* Channel C6 and C8 cannot be used on the same polarisation

**Combination of 2008A and 2008B depending on actual channels used

Table 3-3 Technical Requirements ANSI

The exact arrangements of channel frequencies for each frequency band are shown in Appendix 1.




17

3.4 System configurations

The equipment can be configured as Unprotected N+0 (1+0 to 8+0), Hot Standby or N+1 (1+1 to 7+1)

frequency diversity. Frequency diversity configurations are expandable from 1+0 up to 7+1 or 8+0. In

N+1 frequency diversity systems the protection channel can be utilized for occasional traffic. Space

diversity receivers (optional) can be used in all configurations mentioned above. Automatic Transmitter

Power Control (ATPC) is optionally available. In Co-channel Dual Polarized (CCDP) mode the system

can be expanded up to 16 RF channels.

An optional built-in 3xDS3/E3 multiplexer may be used on each 30/40 MHz RF-channel when the system

capacity is configured to 155 Mb/s.

3.4.1 Hot Standby

The Hot Standby option is configured as two transceivers sharing the same branching and RF-filters. A

Tx-switch between the transceivers and the filter selects the active transmitter. The receiver switching is a

normal 1+1 hitless switching.

3.4.1.1 Hot Standby dual baseband

If STM-1 line protection is required the HSB terminal can be equipped with two interface boards and

configured as Hot Standby dual baseband. In this configuration the 1+1 hitless switching is not used.

3.4.2 Terminal configurations

Each radio channel can be configured with various traffic interfaces (Interface Boards). The protection

channel can be configured to carry occasional traffic by adding an additional Interface Board. The system

can be configured to carry STM-1/OC-3 in 30 MHz or 40 MHz channels.

Both terminal (serving one antenna direction), and double-terminal (serving two antenna directions)

configurations are available.

All RF channels except the protection can be configured with an optional E1/DS1 channel inserted intoSection/Transport OverHead. This channel can be used for wayside traffic.

SDH and SONET overhead termination is according to relevant ITU and ANSI standards (ITU-T Rec.

G.783 and ANSI recommendation: T1.105). The radio terminal is normally configured to terminate only

the 3 upper rows of Section/Transport OverHead (SDH - Regenerator Section, SONET – Section

OverHead).

3.4.2.1 Double terminal

In a double terminal the radios serving two antenna directions are sharing one common rack. This implies

that only one connection panel is needed and the channel independent units such as Supervisory Board

and SVCE Board are common. The configuration is available for systems with up to four RF channels ineach direction. The configuration is saving both cost and space.

3.4.3 Modes of operation

The system can be operated in Adjacent Channel Alternate Polarization (ACAP) mode, Adjacent Channel

Co-Polarization (ACCP) mode, and Co-Channel Dual Polarized (CCDP) mode.

3.4.4 Radio channel identification

Each radio channel is identified by two allocated bits in the media specific byte no. 3 (MS#3) in

Section/Transport OverHead (see chapter 9.5). Channel identification is selected by NEW-NMS software

configuration of the Modem Board.




20

3.13 System performance

3.13.1 Equipment background BER (Residual BER)

Guaranteed equipment background BER ≤ 10-13. Typical residual BER ≤ 10-14.

3.13.2 BER as a function of receiver input levelThe table below shows maximum input signal levels at point B. These limits applies without interference:

10-3 10-6 10-10 Maximum

input level: -12.0 dBm -15.0 dBm -18.0 dBm

Table 3-5 Maximum input level

Typical receiver input thresholds at point B:

• 155 Mb/s: Measured with PRBS of 223-1 mapped into VC-4 and applied to the interface.

• 34/45 Mb/s: Measured with PRBS of 215-1 applied to the interface.• Guaranteed figures are +1dB.

Receiver input thresholds for BER = 10-3

, 10-6

and 10-10

at point B [dBm]

64TCM 128TCM

Frequency

band [GHz] NL-code ≤ 10-3 ≤ 10-6 ≤ 10-10 ≤ 10-3 ≤ 10-6 ≤ 10-10

NL2004A -72 -69 -654

NL2004B -75 -72 -68

NL2005A -72 -69 -655

NL2005B -75 -72 -68

L6 NL2006A -72 -69 -65 NL2006B -75 -72 -68

U6 NL2006C -72 -69 -65

7 NL2007* -72 -69 -65

8 NL2008* -72 -69 -65

11 NL2011A -74 -71 -67

11 NL2011B -71 -68 -64

Table 3-6 Receiver input thresholds

Note 1: These numbers applies for systems with RF-filter type B (see chapter 5.3). For systems with more stringent requirements and using type

A RF-filters, receiver input threshold values have to be modified corresponding to more loss in type A RF-filters.

* All versions




22

3.13.4.1 Dynamic Fading

The sensitivity to dynamic fading can be represented with the following parameters:

155Mbit/s, about 30 MHz channel spacing

•For a notch speed* up to 100 MHz/s and a BER = 10-4, the InterLink can withstand a notch depth of

at least 16 dB (sweeping in ± half channel spacing).

• For a notch speed* up to 100 MHz/s and a BER = 10-6

, the InterLink can withstand a notch depth of


155Mbit/s, 40 MHz channel spacing







* Maximum selective fading notch-depth changes: ≥ 100 dB/s

3.13.5 System delay

The system delay is 18µs

3.14 Interference sensitivity

Minimum interference sensitivity characteristics are given in ETSI EN 300 234 [6], ETSI EN 301 127 [7]

and ETSI EN 301 461 [9].

3.14.1 Co-channel interference sensitivity

The table gives maximum C/I for 1 and 3 dB degradation of 10-6

thresholds given in chapter 3.13.2. The

limits of the co-channel interference sensitivity are shown in the table below:

RSL @ BER 10-6

Degradation 1 dB 3 dB

Channel spacing

(MHz) C/I C/I

28 – 30 33 29

40 29 25

Table 3-9 Co-channel interference sensitivity

3.14.2 Adjacent channel interference sensitivity

The table gives maximum C/I for 1 dB and 3 dB degradation of 10-6 thresholds given in chapter 3.13.2.The limits of the adjacent channel interference sensitivity are shown in the table below:

RSL @ BER RSL @ 10-6

Degradation 1 dB 3 dB

Mode of

Operation

Channel spacing

(MHz) ACAP 28 - 30 +2 -2

ACCP/CCDP 28 - 30 -5 -8

ACAP 40 +1 -3

ACCP/CCDP 40 -4 -8

Table 3-10 Adjacent channel interference sensitivity




29

7. RECEIVER CHARACTERISTICS

7.1 Receiver input characteristics

For receiver maximum input levels and BER thresholds, see chapter 3.13.2

7.1.1 Local Rx-oscillator tolerance and stability

Frequency tolerance: ± 10 ppm

7.1.2 Receiver image rejection

If image(s) frequency falls within receiver half band ≥ 120 dB

If image(s) frequency falls within transmitter half band ≥ 120 dB

7.1.3 Spurious emissions

7.1.3.1 Spurious emissions - externalThe frequency range in which the spurious emission specifications apply is 9 kHz to 110 GHz

Spurious emissions are below the following levels at reference point C:

Emissions from 9 kHz to 21.2 GHz:

< -50 dBm in any 1 kHz band (from 9 kHz to 150 kHz)

< -50 dBm in any 10 kHz band (from 150 kHz to 30 MHz)

< -50 dBm in any 100 kHz band (from 30 MHz to 1 GHz)

<-50 dBm in any 1 MHz band (from 1 GHz to 21.2 GHz)

Emissions from 21.2 GHz to 110 GHz:

< -30 dBm in any 1 MHz band

7.1.3.2 Spurious emissions - internal

For spurious emissions which fall in the same receiver halfband: < –110 dBm.

7.1.4 Noise figures

Noise figures (F) at point A

Frequency

band [GHz] NL-code

Typical

Noise (F)

[dB]

Guarant.

Noise (F)

[dB]

4 NL2004* 2.5 ≤ 3.0

5 NL2005* 2.5 ≤ 3.0

L6 NL2006A 2.5 ≤ 3.0

U6 NL2006* 2.5 ≤ 3.0

7 NL2007* 2.5 ≤ 3.0

8 NL2008* 2.5 ≤ 3.0

11 NL2011* 2.9 ≤ 3.3

Table 7-1 Noise figure

* All versions

Note: Noise figure at point B is calculated by adding the filter loss (B-A) listed in chapter 5.3 to the noise figure at point A.




30

8. MODEM CHARACTERISTICS

The Modem Board includes both modulator and demodulator functions on the same circuit board. The

system filtering is equally distributed between transmit and receive side.

IF characteristicsCentre frequency (Tx-direction): 350 MHz

Centre frequency (Rx-direction): 140 MHz

Impedance: 50 Ω, unbalanced

8.1 Modulator

The main functions of the modulator are:

• Signal processing necessary to access OverHead bytes in the SDH/SONET frame

• Digital pulse shaping FIR-filtering

• 64TCM modulation for 155 Mb/s in 40 MHz channel spacing.

• 128 TCM modulation for 155 Mb/s in 30 MHz channel spacing.

Symbol rate - STM-1/OC-3:

• 64TCM: 31.104 Msymbols/s

• 128TCM: 23.9262 Msymbols/s.

8.2 Demodulator

The main functions of the demodulator parts are:

• 64TCM demodulation for 155 Mb/s in 40 MHz channel spacing• 128TCM demodulation for 155 Mb/s in 28-30MHz channel spacing

• Carrier and clock regeneration

• Digital pulse shaping base band-filtering and slope equalization

• Adaptive Transversal Equalizing

• Trellis decoder utilizing the Viterbi algorithm

• Signal processing necessary to access the OverHead bytes in the SDH/SONET frame

8.2.1 Adaptive Time Domain Equalizer (ATDE)

An Adaptive Time Domain Equalizer (ATDE) is provided for each radio channel in order to establish

effective countermeasures against the distortion effects caused by multipath transmission (selectivefading).

The adaptive time domain equalizer has 13 baud-spaced taps and is used to cancel ISI (Inter Symbol

Interference) caused by multi path fading on the radio signal. Additional features are: Adaptive gain,

adaptive quadrature phase error cancellation and adaptive DC-offset error cancellation. It also controls the

demodulation process e.g. by the internal phase detectors for carrier recovery and clock recovery. Clock

recovery uses separate phase detectors on in-phase and quadrature channels. The frequency of clock

recovery PLL, is programmable, enabling multi-modem functionality.




33

9.5 Section/Transport OverHead (SOH/TOH)

Use of SOH/TOH is according to ITU-T Rec. G.707 and ANSI T1.105.

All X-bytes are reserved for future international standardization according to ITU-T Rec. G.707.

Shaded bytes can be used as a wayside channel

Row\Col 1 2 3 4 5 6 7 8 9

1 A1 A1 A1 A2 A2 A2 J0 N N

2 B1 MS#1 MS#2 E1 X X F1 N N

3 D1 MS#3 X D2 X X D3 X X

4 H1 H1 H1 H2 H2 H2 H3 H3 H3

5 B2 B2 B2 K1 X X K2 X X

6 D4 X X D5 X X D6 X X

7 D7 X X D8 X X D9 X X

8 D10 X X D11 X X D12 X X

9 S1 Z1#2 Z1#3 Z2#1 Z2#2 M1 E2 N N

Table 9-1: Utilization of SOH/TOH-bytes;

9.5.1 Frameword and parity bytes

The first nine bytes in the STM-1/OC-3 frame (row 1 in SOH/TOH) are unscrambled according to ITU-T

Rec. G.707.

• A1: Frameword (11110110)

• A2: Frameword (00101000)

• J0: Regenerator Section Trace (SDH) / Section Trace (SONET)

• B1: BIP-8 (Bit Interleaved Parity-8)

• B2: BIP-24 (Bit Interleaved Parity-24)

Byte 8 and byte 9 in row 1 are reserved for national use and are utilized if the DS1/E1 wayside traffic

option is selected. If not used for DS1/E1 wayside, these bytes shall contain the word 10101010 or

01010101.

9.5.2 Media specific bytes

3 bytes in the SDH/SONET frame (MS#1, MS#2 and MS#3) are used for radio specific purposes:

• MS#1: Radio Protection Switching control

• MS#2: Radio Protection Switching control

• MS#3: RF-id, remote reset, ATPC and E/M-wire for E1, E2 and F1

9.5.3 Other SOH/TOH-bytes

• E1-byte: Orderwire

• F1-byte: User channel, V.11 or G.703 interface optional

• D1-D3 bytes: Embedded Control Channel – Regenerator – ECCr (SDH) / SectionData

Communication Channel (SONET)

• D4-D12 bytes: Embedded Control Channel - Multiplexer -ECC-M (SDH) / SectionData

Communication Channel (SONET)

• E2-byte: Orderwire available when MS-termination (SDH) or Line termination

(SONET) is used

• K1/K2: APS signaling (not used in the radio relay equipment)

• MS-RDI (K2(b6-b8)): Multiplex Section - Remote Defect Indication

• S1 (b5-b8): Synchronization Status Message




34

• M1-byte: Remote Error Identifier (MS-REI –SDH / REI-Line -SONET)

• B1/B2-byte: BIP-8 / BIP-24

• A1/A2-byte: Frameword

• H1-H3 bytes: Pointer

9.5.4 DS1/E1 wayside traffic

A DS1 or E1 wayside channel can be accommodated using the (33) shadowed bytes shown in Table 9-1

9.5.5 64 kb/s channels

When the DS1/E1 wayside is not used, the shadowed bytes in table 1 can optionally be used as

independent 64 kb/s channels offering V.11 or G.703 interface.

9.6 Specifications of jitter and wander

9.6.1 STM-1/OC-3 traffic interface

Input jitter and wander tolerances are according to ITU-T Rec. G.783. Detailed parameters are given inITU-T Rec. G.958. Output jitter and wander generation is according to ITU-T Rec. G.783. Jitter and

wander transfer are according to ITU-T Rec. G.783.

9.6.2 E3 (34 Mb/s) traffic interface

Input jitter and wander tolerances are according to ITU-T Rec. G.823. Jitter and wander transfer are

according to ITU-T Rec. G.783.

9.6.3 DS3 (45 Mb/s) traffic interface



9.6.4 E1 (2.048 Mb/s) wayside interface



9.6.5 DS1 (1.544 Mb/s) wayside interface



10. SERVICE AND WAYSIDE TRAFFIC

10.1 General

The service channels and the wayside traffic channel are transmitted as parts of SOH/TOH conforming to

ITU-T Rec. G.707 and ANSI T1.105. All electrical digital interfaces conform to ITU-T Rec. G.703 and

ANSI T1.105.06. The analogue orderwire interface conforms to ITU-T Rec. G.711. Pulse Code

Modulation (PCM) of voice frequency is used, using A-law compounding characteristics. Use of DS1/E1

for wayside traffic will limit the number of channels available for other services. The DS1/E1 wayside

channel, the express-telephone and omnibus-telephone and the other 64 kb/s channels are utilizing

SOH/TOH as described in chapter 9.5. The express- and omnibus-telephone will always utilize byte E1,

F1 or E2 for transmission if E&M interface is required.




38

11.5.3 Switching operation time

The alarm detection time for BER will strongly depend on the severity of the channel disturbance. BER =

10-5

detection-time will be <1 ms if a degradation that will cause a bit-error rate of 10-4

or worse is

detected. A table giving approximate detection times at different bit-error-rates is given below. The

detection time will depend on the selected threshold for the different criteria:

Actual Switching Criteria Detection Time for Different Thresholds [ms]

BER 10-3 10-4 10-5 10-6 10-7 10-8 10-9 10-10 10-11 10-12 1x10-3 1-2 0.4 -0.8 0.15 - 0.30 0.44 - 0.89 0.18 - 0.36 0.14 - 0.28 0.36 - 0.71 0.16 0.31 0.06 - 0.12 0.02 - 0.04

1x10-4 NA 1-2 0.37 - 0.73 1.11 - 2.22 0.44 - 0.89 0.36 - 0.71 0.89 - 1.78 0.39 0.78 0.16 - 0.31 0.04 - 0.09

1x10-5 NA NA 1-2 3.0 - 6.1 1.2. - 2.4 0.97 - 1.93 2.4 - 4.4 1.1 2.1 0.42 - 0.85 0.12 - 0.24

1x10-6 NA NA NA 8-16 3.2 - 6.4 2.6 - 5.1 6.4 - 12.8 2.8 5.6 1.1 - 2.2 0.32 - 0.64

1x10-7 NA NA NA NA 8-16 6.4 - 12.8 16 - 32 7 - 14 2.8 - 5.6 0.8 - 1.6

1x10-8 NA NA NA NA NA 16-32 40 - 80 17.5 - 35 7 - 14 2 - 4

1x10-9 NA NA NA NA NA NA 128-256 56 - 112 22 - 45 6.4 - 12.8

1x10-10 NA NA NA NA NA NA NA 128-256 51 -102 15 - 29

1x10-11 NA NA NA NA NA NA NA NA 128-256 37 - 73

1x10-12 NA NA NA NA NA NA NA NA NA 128-256

Table 11-1 Switching operation time

NA - Not Available

The different BER criteria, HBER, LBER and Early Warning (EW), can be selected from the table above.

The only restriction is: HBER > LBER > EW.

A processing and communication time is added to the criteria detection time to get the total switching

operation time. The Communication and Processing time depends on system type and is given below:

• 1+1 Radio Protection Systems (without Occasional Traffic): < 2 ms

• N+1 Radio Protection Systems (including 1+1 with Occasional Traffic): < 10 ms

• Hot Standby transmitter switching time: ≤ 30 ms

If switching is initiated in both directions at the same time, this can increase the total switching operation

time slightly.

12. SYSTEM SUPERVISORY CHARACTERISTICS

12.1 General

The InterLink equipment has all functionality that is required in a Network Element (NE) in a managed

SDH/SONET transmission network. A LCT provides configuration, control and alarm display facilities to

enable the InterLink to be managed locally or in a whole Nera radio network. A TCP/IP stack is provided

for remote connection of the radio equipment via LAN/WAN. The different radio subnetworks may beinter-connected through the built-in Network Interfaces (NI) or by using a TCP/IP or OSI connection. The

NEW-NMS element manager offers services such as:

Fault management: collecting and logging alarms and analogue measurements from the

elements.

Performance management: collecting and logging quality measurements according to standards

(G.784)

Configuration management: addresses the configuration of elements, getting/setting configuration

from/to elements and SW download functions.

Security management: deals with user privileges and how this is administrated network.




40

12.4 Security management

The user must have a username and password defined in the InterLink in order to log in. Each user name

is defined with access privileges. Four levels are defined:

User level Privileges

Passive Users Passive users are only able to monitor data. They are not able to collect data or change

the network configuration.

Active Users Active users are able to collect data and change some communication settings, but not

commands that can make unrecoverable configuration changes.

Master Users Master users have access to all NEW-NMS/LCT commands, except those attended

with user account administration.

Admin Users Admin users have access to all NEW-NMSLCT commands. The Admin user is the

administrator and will be responsible for adding, deleting and managing user accounts

and privileges.

12.4.1 Security event logging

The InterLink can log events related to security. The log size is 1000 events. The log can be set to wrap-

around or halt when it is full. The operator can also clear the log.

12.5 ECC (Embedded Communication Channel)

The ECC channel can be configured by the operator. Normally DCC-r (D1 to D3) is used for ECC

purpose but any other available SOH/TOH byte can be used. When DCC-r is used the transmission

capacity is 192 kb/s, if another single SOH/TOH byte is used the transmission capacity is 64kb/s. The

protocol used can be NNP (Nera Networking Protocol), TCP/IP or Qecc. The link layer properties of the

Qecc can be configured by the operator. The routing protocol used for Qecc is IS-IS (ISO 10589)

12.5.1 IP Routing

The InterLink contains a routing function that enables routing of TCP/IP and UDP/IP traffic between the

various management interfaces such as the Ethernet interface and the ECC channel. The routing protocol

used is OSPF (Open Shortest Path First)/RIP2. This enables transport of IP based management protocols

for other telecom equipment over a InterLink path.

12.6 Embedded SNMP agent

The InterLink has an optional embedded SNMP agent, for more information see the separate SNMP MIB

description.




45

• Service telephone function, four 64 kb/s insertion channels and PABX-adapter, all on the same board.

• Service telephone function and four 64 kb/s insertion channels, not including PABX, on the same

board.

13.1.6 Auxiliary Services Board

The Auxiliary Services Board includes an Alarm Adapter function to facilitate remote control and

external alarm collection, an Alarm Out function to enable parallel output of internal alarms from the

Supervisory Board and an Analogue Input function to enable analogue voltage measurements. The board

contains a µ-Controller for alarm collection and controlling purposes. The µ-Controller is connected to

the supervision system via a bus.

13.1.7 Power Filtering Board

The Power Filtering Board is used to filtering the current flowing into the equipment from the 48V

battery and thereby prevents noise from entering the equipment. The board also includes main power

switch and fuse. This board is always duplicated in multichannel systems to increase the system MTBF.

13.1.8 Alarm Display & Relay Board

The Alarm Display & Relay Board has the following functions:

• LCT connection port

• Four LEDs for Critical, Major/Minor, Warning and Power On

• Relays for the Critical and Major/Minor alarms and for the Warning indicator

• Inventory control, temperature monitoring, voltage reading and alarm collection

13.1.9 Connection Panels

The Connection Panels include board connectors for all circuit boards in the equipment and user interface

connections at the upper part of the panels. The panels are available in two versions depending on the

system configuration.

• A half sized board, Connection Panel Smaller Systems, occupying half the subrack-width suitable for

systems using one or two radios.

• A full size board, Connection Panel Larger Systems, occupying a full subrack suitable for 2+1 and

larger systems.




46

APPENDIX 1 Channel frequencies

n RF-freq. n' RF-freq.

# [MHz] # [MHz]

1 3824.5 1 4037.5

2 3853.5 2 4066.5

3 3882.5 3 4095.5

4 3911.5 4 4124.5

5 3940.5 5 4153.5

6 3969.5 6 4182.5

Table Appendix 1.4.1 Channel frequencies for the 4 GHz frequency band with 29 MHz

channel spacing as defined in ITU-R F.382-7 and in CEPT 12-08 E

Annex B, 1


# [MHz] # [MHz]

1 3 620 1 3 9402 3 650 2 3 970

3 3 680 3 4 000

4 3 710 4 4 030

5 3 740 5 4 060

6 3 770 6 4 090

7 3 800 7 4 120

8 3 830 8 4 150

9 3 860 9 4 180


channel spacing as defined in ITU-R F.635-6 Annex 1,6


# [MHz] # [MHz]

1 3620 1 3940

2 3660 2 3980

3 3700 3 4020

4 3740 4 4060

5 3780 5 4100

6 3820 6 4140

7 3860 7 4180


channel spacing as defined in ITU-R F.635-6 Annex 1, 3a


# [MHz] # [MHz]

1 3 610 1 3 930

2 3 650 2 3 970

3 3 690 3 4 010

4 3 730 4 4 050

5 3 770 5 4 090

6 3 810 6 4 130

7 3 850 7 4 170

Table Appendix 1.4.4 Channel frequencies for the 4 GHz frequency band with 40 MHzchannel spacing as defined in CEPT 12-08 E Annex A, 1




50


# [MHz] # [MHz]

1 7140 1 7315

Table Appendix 1.7.6 Channel frequencies for the 7 GHz frequency band with 30 MHzchannel spacing as defined in SRSP-307.1 Sub-plan I (Canada)


# [MHz] # [MHz]

1 7440 1 7590


channel spacing as defined in SRSP-307.1 Sub-plan II (Canada)

n RF-freq. n' RF-freq.# [MHz] # [MHz]

1 7442 1 7596

2 7470 2 7624

3 7498 3 7652

4 7526 4 7680

5 7554 5 7708


channel spacing as defined in ITU-R F.385-7 Annex 1, 1


# [MHz] # [MHz]1 7457 1 7625

2 7485 2 7653

3 7513 3 7681

4 7541 4 7709

5 7569 5 7737


channel spacing as defined in ITU-R F.385-7 Annex 3, upper part


# [MHz] # [MHz]

1 7428 1 7610

2 7456 2 7638

3 7484 3 7666

4 7512 4 7694

5 7540 5 7722


channel spacing as defined in ITU-R F.385-7 Annex 1, 4




54


# [MHz] # [MHz]

1 10715 1 11245

2 10755 2 11285

3 10795 3 11325

4 10835 4 113655 10875 5 11405

6 10915 6 11445

7 10955 7 11485

8 10995 8 11525

9 11035 9 11565

10 11075 10 11605

11 11115 11 11645

12 11155 12 11685


channel spacing as defined in ITU-R F.387-8 Rec. 1


# [MHz] # [MHz]

2 10735 2 11265

3 10775 3 11305

4 10815 4 11345

5 10855 5 11385

6 10895 6 11425

7 10935 7 11465

8 10975 8 11505

9 11015 9 11545

10 11055 10 11585

11 11095 11 11625

12 11135 12 11665


channel spacing as defined in ITU-R F.387-8 Annex 1 and CEPT 12-

06 Rec. 1


# [MHz] # [MHz]

1 10735 1 11225

2 10775 2 11265

3 10815 3 113054 10855 4 11345

5 10895 5 11385

6 10935 6 11425

7 10975 7 11465

8 11015 8 11505

9 11055 9 11545

10 11095 10 11585

11 11135 11 11625

12 11175 12 11665


channel spacing as defined in ITU-R F.387-8 Annex 2, CEPT 12-06

Rec. 3, FCC §101.147 (o-7)(US) and SRSP-310.7 (D/D’)(Canada)

Nera Interlink Technical Description

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