TU21133 Ethernet

TU 21133.01/TU 21133.02Ethernet Interface Unit

Operating Manual

C33990.85--C0

DN0267533 © Nokia Corporation 1 (64)Issue 3-1 en Nokia Proprietary and Confidential

TU 21133.01/TU 21133.02 Ethernet Interface Unit

The information in this documentation is subject to change without notice and describes onlythe product defined in the introduction of this documentation. This documentation is intendedfor the use of Nokia's customers only for the purposes of the agreement under which thedocumentation is submitted, and no part of it may be reproduced or transmitted in any form ormeans without the prior written permission of Nokia. The documentation has been prepared tobe used by professional and properly trained personnel, and the customer assumes fullresponsibility when using it. Nokia welcomes customer comments as part of the process ofcontinuous development and improvement of the documentation.

The information or statements given in this documentation concerning the suitability, capacity,or performance of the mentioned hardware or software products cannot be considered bindingbut shall be defined in the agreement made between Nokia and the customer. However, Nokiahas made all reasonable efforts to ensure that the instructions contained in the documentationare adequate and free of material errors and omissions. Nokia will, if necessary, explain issueswhich may not be covered by the documentation.

Nokia's liability for any errors in the documentation is limited to the documentary correction oferrors. NOKIA WILL NOT BE RESPONSIBLE IN ANY EVENT FOR ERRORS IN THISDOCUMENTATION OR FOR ANY DAMAGES, INCIDENTAL OR CONSEQUENTIAL(INCLUDING MONETARY LOSSES), that might arise from the use of this documentation orthe information in it.

This documentation and the product it describes are considered protected by copyrightaccording to the applicable laws.

NOKIA logo is a registered trademark of Nokia Corporation.

Other product names mentioned in this documentation may be trademarks of their respectivecompanies, and they are mentioned for identification purposes only.

Copyright © Nokia Corporation 2003. All rights reserved.

DYNANET is a registered trademark of Nokia Corporation. Any other trademarks mentioned inthe documents are the property of their respective owners.

The following products comply with the protection requirements of the European Union CouncilDirective 89/336/EEC relating to electromagnetic compatibility (EMC), provided that installedusing EMC-compatible installation practices (installation in mechanical housings stated to beEMC-compatible and using cabling material [at least as well shielded] and practices as statedin relevant Nokia Networks user manuals):

Productcode

Product name Release

TU 21133.01

TU 21133.02

Ethernet Interface Unit (EIU)

Ethernet Interface Unit (EIU) with integrated hub

02A

01A

2 (64) © Nokia Corporation DN0267533Nokia Proprietary and Confidential Issue 3-1en

Contents

Contents 3

Summary of changes 5

1 About this document 7

2 Functional description 92.1 Overview 102.2 Network applications 132.3 Technical specifications 18

3 Installation 213.1 Introduction 213.2 Mounting units into cartridges and subracks 223.2.1 Power supply 223.2.2 Equipping 223.3 Signal interfaces and cabling 233.4 Grounding of shielded cables 263.4.1 Stripping of cables 273.4.2 Grounding of cables 27

4 Operation 294.1 Introduction 294.1.1 General 294.1.2 Start-up of the unit 304.1.3 Software settings 314.2 Maintenance 314.2.1 Alarms 324.2.2 Interface status LEDs 33

5 Service Menu Reference 375.1 Service menus 385.2 General 425.3 Service Terminal main menu 435.4 Ethernet Interface Unit menus 455.4.1 Fault display 465.4.2 Identifications 475.4.3 Controls (temporary) 485.4.4 Settings (permanent) 515.4.5 Measurements 615.4.6 Statistics 615.4.7 Testing 62

Glossary 63


Summary of changes

Document Date Comment

DN0267533 Issue 3-1 en 15 Oct 2003 This manual is valid for programs TS 25442.01version 03A and TS 25442.02 version 02A.


About this document

1 About this documentThis operating manual describes the operation and installation of Nokia'sEthernet Interface Unit (EIU).

The covered topics are:

• Functional Description (Chapter 2)

• Installation (Chapter 3)

• Operation (Chapter 4)

• Service Menu Reference (Chapter 5).

Related documents

For more information about the Service Terminal, refer to the OperatingHandbook of the Service Terminal.


Functional description

2 Functional descriptionThis chapter describes the functional principles of the Ethernet Interface Unit(EIU).


• Overview of the unit (Section 2.1)

• Network applications (Section 2.2)

• Technical specifications (Section 2.3).



Figure 1. Ethernet Interface Unit (EIU) installed in a subrack

2.1 Overview

Ethernet Interface Unit (EIU) is designed to enhance flexibility of the Dynanetproduct family. The EIU unit provides direct Ethernet interfaces for customerdata applications. One Dynanet node can offer POTS, ISDN and data connectionson the same E1 transmission link.



The unit operates as a transparent bridge and it provides two independent 10Base-T Ethernet interfaces. EIU combines two Ethernet ports over the WAN and allprotocols are simply passed through from the LAN side to the WAN. EIU can beconnected to PCs, hubs and other LAN equipment by using the 10Base-T cablingwith an RJ45 connector.

Ethernet packets are carried over the time-division multiplexing (TDM) networkin the high-level data link control protocol (HDLC) frame. EIU offers data ratesn x 64 kbit/s (n=1...31) from 64 kbit/s up to 1984 kbit/s over a WAN link. EIUlearns automatically medium access control (MAC) addresses on the LAN it isconnected to and forwards only the frames that are destined to another LAN. EIUcan store up to 10000 MAC addresses.

The unit is connected to the Dynacard bus and it can be installed into all Dynanetcartridges and subracks. EIU needs a master unit which performs multiplexing ofdata to the TDM network. As a master unit can operate DM 2, DM 2+, DB 2, DN2, or ACM2.

The TU 21133.02 unit has two integrated hubs. Both hubs have two local 10Base-T interfaces and one port is connected to the WAN.

Hubs can be connected together with a digital cross-connection. In this case, thereare four local interfaces and two ports are connected to the WAN.

The EIU unit has the following features:

• fully compatible with other Dynanet products

• two 10Base-T Ethernet interfaces, IEEE 802.3

• transparent bridging with the MAC level filtering

• transmission rates n x 64 kbit/s, the maximum rate 1984 kbit/s

• management via the master unit's Q1 bus

• compatible with DNT2M-G and the ET interface.

In addition, the TU 21133.02 unit has the following features:

• two integrated hubs

• 2 x 2 10Base-T interfaces

• digital cross-connection.



Figure 2. Block diagram

Memory+glue logic

ET-IC 2 DICHUB 2

Memory+glue logic

ET-IC 1

10 BASE-TIF 1A

DIC Bus IF

ControlPLL

Power+5V

Batteryvoltage

48 V DC

V5P

10 BASE-TIF 1B

HUB 1

XC

Payload data

Data & address bus

Wan clock

Only on TU21133.02

10 BASE-TIF 2A

10 BASE-TIF 2B



2.2 Network applications

This section shows some application examples how Dynanet nodes with EthernetInterface Units are often located in networks.

In Figure 3, there is a point-to-point bridge where two LANs are located inseparate sites. These sites are connected together over the TDM network usingEIU units.

Figure 3. A point-to-point bridge using EIUs

To configure multipoint transmission, allocate one port to the incoming time slotson the link and the other to the outgoing link. Both Ethernet ports are connectedto the same Ethernet repeater hub or to the same Ethernet switch. In both ports,the number of time slots should be the same.

To configure multipoint transmission with the TU 21133.02 unit, you just need toenable the internal cross-connection to obtain four local ports and two portsconnected to the WAN.

DNT2M

POTS

POTS

LANLAN

Direct connection

10BaseT 10BaseT

Dynanet node with Ethernet Interface Unit

TDM network E1E1



Figure 4. A multipoint connection

Whole LANs can be connected to an EIU via a repeater hub, switch or router. OnePC can be directly connected to an EIU via a cross-connected cable.

The EIU unit uses the high-level data link control protocol (HDLC) framing andrequest for comments (RFC) 1662 in the WAN side link and it is combatible withDNT2M and the ET interface (see Figure 6).

Transmissionnetwork

2 Mbit/sconnection

2 Mbit/sconnection

2 Mbit/sconnection

External HUB

LAN

External HUB

LAN

DB2B2 and XS TU21133.01

TU21133.02DB2B2 and XS

DB2B2 and XS TU21133.01



Figure 5. Multipoint bridging with TU 21133.02

Figure 5 shows an example of the multipoint network.

The EIU unit has four local Ethernet ports and two remote ports connected to theWAN. The transmission rate in the WAN is 256 kbit/s and time slots 1 to 4 areallocated to one channel and time slots 5 to 8 to another channel.

Time slots are then connected to a network element (for example DB 2 or DN 2)where they can be routed to different directions.

Integratedhub

EIUTU21133.02

10BASE-T

MUX

DXCTDM

TS 5-8TS 1-4

E1 link

TDM



Figure 6. Connection to LAN or direct connection

The EIU unit can be installed with other Dynacard units, and the same node canoffer data and voice applications. Ethernet time slots can be freely mixed withvoice and other data time slots and they all can be transmitted via the same E1 link(see Figure 7).

Figure 7. Connection to LAN with other interface units

DNT2Mwith

Ethernet interface

E1E1MasterUnit

EIU CHunit

ACL2

LAN

10BaseT cablingfrom a router ordirectly from a PC toEIU.

10BaseT

2Mbit/s cabling toline equipment

Transmissionnetwork

DNT2M

LAN

Other data: V.35,V.24,X.21

10BaseT

TDMnetwork

E1

POTS

Connectionto datanetwork andto localexchange

nxE1

nxE1



Figure 8. MAC filtering enabled

When the filtering option is enabled (see Figure 8), the EIU unit stores MACaddresses of the local segment. In this case, only the packets that are destinated toanother segment are forwarded over the WAN.

Although the filtering is enabled, broadcasts and multicasts are always forwardedover the WAN.

Segment A

PC1 PC2

HUB

EIU

Tranmissionnetwork

WAN

Segment BHUB

EIU

When the MAC filtering isenabled, packets are notforwarded to the WAN



Figure 9. MAC filtering disabled

When the filtering is disabled (see Figure 9), all the packets are forwarded overthe WAN, no matter what the packets' destination address is.

2.3 Technical specifications

This section describes the technical specifications of the Ethernet Interface Unit.

Segment A

PC1 PC2

HUB

EIU

MAC filtering isdisabled in EIU

Tranmissionnetwork

WAN

Segment BHUB

EIU

PC3 PC4

Mechanical dimensions

Height 233 mm (6 U)

Width 20 mm (4 T)

Depth 160 mm

Weight 240 g



Electrical specifications

Input voltage 20 V to 72 V

Power consumption

Typical 3.5 W

Maximum 10 W

Electromagnetic compatibility (EMC) ETS 300 386 (2000)

Interfaces

LAN 10Base-T, IEEE 802.3

Max. cable length 100 m

WAN HDLC, RFC 1662

Cabling

Category 5 (CAT5)

Cable Shielded, type S/FTP

Max. cable length 100 m

Environmental conditions

Operation ETS 300 019, Class 3.1E Temperature controlledlocations

Storage ETS 300 019, Class 1.2. Weather protected, nottemperature controlled storage locations

Transportation ETS 300 019, Class 2.3. Public transportation


Installation

Caution

3 InstallationThis chapter describes how to install the Ethernet Interface Unit into a subrack orcartridge.


• Introduction (Section 3.1)

• Mounting of units into cartridges and subracks (Section 3.2)

• Signal interfaces and cabling (Section 3.3).

3.1 Introduction

The Ethernet Interface Unit is installed into a TM4 equipment cartridge. TheOperating Manual for TM4 Construction Practice explains the connection ofcentral battery voltages and rack alarms to the cartridges, routing of signal cables,connection of groundings, as well as installation planning and work order.

EIU units are ready to operate after their installation into a cartridge and theconnection of signal cables.

Instructions for installation of the equipment into cartridges and cabling of signalinterfaces are given below.

Always use a wrist grounding or other such protection when handling a plug-inunit removed from its package.



3.2 Mounting units into cartridges and subracks

3.2.1 Power supply

When the unit is inserted into its location in the cartridge, the central batteryvoltage is connected through the motherboard of the cartridge and back connectorPB1 of the unit. At the same time, the unit is also grounded to the cartridge body.

Figure 10. Back connector PB1

3.2.2 Equipping

Connectors of the cartridge motherboards and back connectors of the units arestandardised so that voltages and rack alarm signals conveyed by them are alwayslocated in the same place. Due to this, no unit location in the cartridge is reservedfor a particular set of equipment.

The unit can be installed in any TM4 cartridge equipped with a MUX unit and itcan be inserted in any unit location. The cartridge can also house other equipmentof the Nokia ND equipment generation.

An EIU unit takes one unit location (width 5 T) in a cartridge. Figure 11 showsan equipping example: three EIU units have been mounted into a 20 T cartridge.

a1

c b a

a2a3a4a5a6a7a8a9a10a11a12a13a14

a20a21

a24a25a26a27a28a29

a32

Back connector PB1

a19

MP5V For testinga15

a17a18

a16

a23

VNBVPB

Battery voltage, negativea30a31 Battery voltage, positive

VAP5 External aux. voltage +5 Va22GND Ground


Installation

Figure 11. Equipping in a 20 T cartridge

3.3 Signal interfaces and cabling

The cable type is S/FTP Category 5 (CAT5) and the maximum cable length is 100m. Connectors are shielded 8-pin modular connectors (RJ45 type).

Figures 12 and 13 present the pin order of the interface connectors on the TU21133.01 and TU 21133.02 units. Figure 14 presents the cabling diagrams andFigure 15 shows the RJ45 connector.

You can check correctness of the cabling at the link integrity LED.

Polarity of the RD- and RD+ signals is automatically corrected.

NOKIA

Rack

LOCATION UNIT CHANNELS

1234

MUX unitEIU unit 1EIU unit 2EIU unit 3

1...21...21...2

1 2 3 4

MUX EIU EIU EIU

P1 P1

P1

P3

20 Tcartridge

P2 P2 P2

P1



Figure 12. Pin order of the interface connectors on TU 21133.01

J11

J21

Channel Connector Pin Signal Direction1 J11 1 TD+1 J11 2 TD-1 J11 3 RD+1 J11 4 ground1 J11 5 ground1 J11 6 RD-1 J11 7 ground1 J11 8 ground

2 J21 1 TD+2 J21 2 TD-2 J21 3 RD+2 J21 4 ground2 J21 5 ground2 J21 6 RD-2 J21 7 ground2 J21 8 ground

EIU --> DTEEIU --> DTEEIU <-- DTE

EIU <-- DTE

EIU --> DTEEIU --> DTEEIU <-- DTE

EIU <-- DTE


Installation

Figure 13. Pin order of the interface connectors on TU 21133.02

Channel Connector Pin Signal Direction1A J11 1 RD+1A J11 2 RD-1A J11 3 TD+1A J11 4 ground1A J11 5 ground1A J11 6 TD-1A J11 7 ground1A J11 8 ground

1B J12 1 RD+1B J12 2 RD-1B J12 3 TD+1B J12 4 ground1B J12 5 ground1B J12 6 TD-1B J12 7 ground1B J12 8 ground

2A J22 1 RD+2A J22 2 RD-2A J22 3 TD+2A J22 4 ground2A J22 5 ground2A J22 6 TD-2A J22 7 ground2A J21 8 ground

2B J21 1 RD+2B J21 2 RD-2B J21 3 TD+2B J21 4 ground2B J21 5 ground2B J21 6 TD-2B J21 7 ground2B J21 8 ground

J11

J12

J22

J21

EIU <-- DTEEIU <-- DTEEIU --> DTE

EIU --> DTE


EIU --> DTE


EIU --> DTE


EIU --> DTE



Figure 14. Cabling diagrams

Figure 15. RJ45 connector

3.4 Grounding of shielded cables

EMC requirements are only met when a shielded twisted pair cable (S/FTP) isused.

TD+ 1TD- 2RD+ 3

45

RD- 678

1 TD+2 TD-3 RD+456 RD-78

RJ45 Plug RJ45 PlugCAT5 Cable

TD+ 1TD- 2RD+ 3

45

RD- 678

1 TD+2 TD-3 RD+456 RD-78

RJ45 Plug RJ45 PlugCAT5 Cable

Ethernet straight-through cable

Ethernet cross-connected cable

1 2 3 4 5 6 7 8


Installation

This is the recommended grounding method for all shielded pair cables.

3.4.1 Stripping of cables

Strip the sheath at the grounding point only. For the correct stripping dimensions,see Figure 16.

Begin by making transverse incisions at the marked places without cutting all theway through the cable's outer insulation. Then join the transverse incisions by alongitudinal incision which should cut through the outer insulation but notdamage the cable's inner parts.

You can now easily remove the needed length of the outer insulation by grabbingthe edge of the longitudinal incision and turning it around the cable. Dependingon the cable's structure, the protective metal layer may be under a protective bandwhich must also be removed.

Figure 16. Stripping dimensions

Stripping dimensions are as follows:

• Dimension 'a' is 90 mm, length between the connector and the stripped partof the cable.

• Dimension 'b' is 40 mm, length of the stripped part.

3.4.2 Grounding of cables

Ground the cables by fastening each of them with two cable ties to the groundingrail with their conductive grounding screen and/or grounding conductor attachedto the EMC gasket.

One of the cable ties is fastened around the unstripped part of the cable and theother around the grounding screen. When fastening the latter cable tie, be carefulnot to damage the grounding screen. The lock of the cable tie is placed on top ofthe cable, not on the side (see Figure 17).

a b



Figure 17. Grounding of cables to the grounding rail

The cable's grounding screen must be in good electrical contact with theconductive EMC gaskets of the cable grounding assemblies. Proper electricalcontact must be ensured, for example by measuring the resistance. During themeasurement, cable ends must not be in contact with anything. The resistance —as measured from the cable screen at one connector to the body of the subrack —must be less than 1.0 ohms.


Operation

4 OperationThis chapter describes the operation and maintenance of the Ethernet InterfaceUnit.


• Start-up of the unit (Section 4.1.2)

• Software settings (Section 4.1.3)

• Alarms (Section 4.2.1)

• Interface status LEDs (Section 4.2.2).

4.1 Introduction

4.1.1 General

Operation of the Ethernet Interface Unit is controlled via the service interface ofthe MUX unit using the Service Terminal. Through this interface, equipment stateand alarm data are read, controls and settings are given, loopbacks are set, etc.

If service interfaces have been connected into a bus and the buses have beenfurther connected into a service network by means of a data channel, allequipment connected to the bus or network can be remote-controlled from onepoint using the Service Terminal or the Transmission Management System TMS(see the Operating Manual for the TMS Transmission Management System).

Chapter 5 'Service Menu Reference' in this document describes the service menusobtained from the equipment and their use. For the Service Terminal, there is aseparate Operating Manual.

The EIU unit is ready to operate after its installation into a cartridge equippedwith a MUX unit and connection of signal cables. Before commissioning,however, identifications and settings should be checked, required changes in thefactory settings made, and statistics and error counters reset.

Commissioning measurements are not necessary.



Note

4.1.2 Start-up of the unit

1. Insert the EIU unit, the DYNACARD-MUX (DM 2, DB 2 or DN 2) andany other units that may be included in the configuration in a DM 2, DB 2or DN 2 equipment cartridge.

2. Connect the Service Terminal to the service connector of theDYNACARD-MUX and establish a connection to the equipment(connection cables not connected):

3. The green LED is lit to indicate that a connection from the ServiceTerminal to the equipment has been established.

Whenever a new plug-in unit is inserted in a unit location, it should be providedwith the default settings:

4. Perform equipment installation by installing all units:

Verify:

5. Check error messages given by the equipment:

Response:OBJ 7 RET

Current object:AD 4095/DM29600 bit/s/EOB/

TOP 6 9 u ,, , 1 RET, 1

- (duration approx. 10 s)

TOP 6 2 3 RET

Response:

Installing/EOB/

, ,

TOP 6 2 0 RETResponse:

EIUnx64 unit 2/EOB/

, ,


Operation

If errors are found, check the configuration of the equipment.

4.1.3 Software settings

Set the following settings for both channels (the default setting with italic):

• Select transmission rate and time slot(s) for the channel

6,9,u,3,channel,2,1,transmission rate,1,time slot(s)

• Set the channel into use (channel in use/channel not in use)

6,9,u,3,channel,1,1

Removing unit from the subrack

The unit must be provided with the following software settings when it isremoved from the subrack:

• Take the channels out of use by selecting:

6,9,u,3,n,1,2

• Remove the unit from the configuration by selecting:

6,2,2,u

4.2 Maintenance

The equipment does not require scheduled maintenance. Maintenance is neededonly when the equipment indicates with alarms that there is a fault. Accurate dataconcerning the equipment state and nature of the fault are obtained via the ServiceTerminal.

Additional data on the condition of the equipment and on signal quality areobtained from measurements and statistics made by the equipment itself.Measurement results and statistics are read with the Service Terminal.

The Service Terminal can also be used to carry out tests and set on loopbackspossibly required in fault location.

TOP 1 RET



4.2.1 Alarms

Figure 18. Alarm indication, general principle

Interpretation of alarms at equipment level

When the red service LED is lit, there is a serious fault in the equipment and theequipment usually has to be replaced with a new one. The red service LED, redrack alarm lamp and programmable alarm output PA1 are activated by means ofan external auxiliary voltage.

When the yellow service LED is lit, the signal received by the equipment may befaulty. The alarm can also be triggered by a controlled service function performedin the equipment (for example, loopback or forced indication). The equipmentindicating the alarm is not necessarily faulty; alternatively, the fault may be in thefar-end equipment or in the signal cabling.

The green service LED is lit when the equipment is connected to the ServiceTerminal.

Interpretation of alarms at unit level

Operation of the unit's logic section can be superficially checked by observing thestates of the unit's service LEDs.

RACK ALARM LAMPS

SERVICE LEDS

red

yellow

green

red alarm A

white

yellow

alarm B

alarm D(reminder of alarm

(prompt)

(deferred)

serious fault in the equipment

fault in the signal received bythe equipment, equipment fault,

equipment connected to theService Terminal

or controlled service function(e.g. loopback) in the equipment

cancellation)


Operation

• The red service LED is lit when the unit is faulty.

Note: If there is a power supply fault, the red LED is lit even if the faultwere outside the unit.

• The yellow LED is lit when the fault is somewhere else in the equipment.

• The green service LED is lit when transmission management actions aredirected to the unit via the service interface on the MUX unit.

State and fault messages

The following table describes the state and fault messages of the equipment thatare obtained by the Service Terminal through the service menu option 1 Faultdisplay. The rack alarm/service LED indication in each situation is alsoindicated.

4.2.2 Interface status LEDs

On the EIU unit, there are five interface status LEDs for both interfaces. TheseLEDs indicate the operational state of the Ethernet interface.

The interface status LEDs are:

Table 1. Indication of fault conditions

Fault code(HEX.)

Fault condition Rack alarms LEDs

00H Power supply fault A red

14H Blocked from use A yellow

16H Loop to equipment B yellow

31H Loss of incoming signal B yellow

71H Buffer over/underflow B yellow

80H Equipment fault A red

8EH Installation fault B red

95H Forced fault indication B yel./ red/ grn.



• Integrity (on the TU 21133.01 unit only)

The link integrity LED indicates a good link integrity on a twisted pair port.Link integrity informs that the EIU unit's port is connected to anotherEthernet-compatible equipment and the cabling is operational.

• WAN activity

This LED indicates that data is being transmitted or received over theWAN. The LED blinks always when there is transmission over the TDMnetwork.

• LAN activity

On the TU 21133.01 unit, this LED indicates that data is being transmittedover the LAN.

On the TU 21133.02 unit, this LED is lit when the EIU unit's port isconnected to another Ethernet-compatible equipment and the cabling isoperational. This LED blinks when data is transmitted over the LAN.

• Collision

A collision has occurred on the LAN.

• Buffer

This LED function is used to indicate a buffer overflow. The EIU unitremains functional even if buffer overflows occur.

The buffer LED function provides an indication to the system manager thatthe traffic rate is not balanced between the LAN and WAN sides and thebuffer capacity is not sufficient for the current set-up. If this situationcontinues for a while, the error LED will be lit all the time. After the bufferhas been cleared, the error LED will be turned off.


Operation

Figure 19. Interface status LEDs on TU 21133.01

J1

J2

P1

IC1CA

IntegrityWAN ActivityLAN ActivityCollisionBuffering

IntegrityWAN ActivityLAN ActivityCollisionBuffering

LM1C



Figure 20. Interface status LEDs on TU 21133.02

LAN channel 2A

J11

J12

J22

J21

LAN 1A activity

LAN 2A activity

LAN channel 1A

LAN channel 1B

LAN channel 2B

P1

LM1C

LAN 1B activity

WAN ActivityCollisionBuffer overflow

LAN 2B activity

WAN ActivityCollisionBuffer overflow


Service Menu Reference

5 Service Menu ReferenceThis chapter shows the service menu diagrams of the EIU unit. The diagramsconsist of rectangular boxes (representing Service Terminal displays) which havebeen arranged in hierarchical fashion: the main menu is shown on the top left ofthe page and the submenus proceed downwards and to the right of the main menu.

The following menus are covered:

• setting and reading identifications

• setting temporary controls

• setting and modifying permanent settings

• reading measurement results

• conducting tests.



5.1 Service menus

2

1)

TOP

Select operation:1 Fault display2 Local alarm cancel3 Reset local cancel4 Identifications5 Controls (temporary)6 Settings (permanent)7 Measurements8 Statistics9 Testing

10 User privileges11 Miscellaneous

SERVICE TERMINAL MENUS FOR ETHERNET INTERFACE UNIT

Select unit selection: 9

Select unit number:(unit slot in cartridge)

4-9

9

EIU nx64k Identifications:3 User manual5 Hardware ID6 Program version7 Modify IDs

EIU nx64k Unit Controls:0 Display controls1 Controls to normal

4 Forced indication

EIU nx64k Settings:0 Display settings1 Set defaults3 Channel settings4 Slip alarm limit5 Loopback time limit7 A/D Calibration

EIU nx64k Measurements:0 Fault display

EIU nx64k Testing:Read 8 byte

3 Loop to equipment (WAN)

4,9,u

5,9,u

6,9,u

7,9,u

9,9,u

Select main level:4...9

8 Read/load settings9 Cross-connection *)

1 Voltage measurements

EIU nx64k Statistics

8,9,u2)

2) Not implemented

1)

1)

1)

1)

1)

1) Menu path continues. See the following pages.

*) On TU 21133.02 only



4,9,u

C33990.20

TU 21133.01 01A

TS 25442.01 01A

Modify IDs:5 Hardware ID

Identification:0 Display1 Modify

Give new ID:1-15 characters

4,9,u,3

4,9,u,5

4,9,u,6

4,9,u,7 4,9,u,7,5

4,9,u,7,5,1

IDENTIFICATIONS:

EIU nx64k Identifications:3 User manual5 Hardware ID6 Program version7 Modify IDs

5,9,u

Sel. chan.:

Select indicator:

5,9,u,3

5,9,u,4

Loop to equipment (WAN):1 Display loop state2 Set loop on3 Remove loop

CONTROLS:

1 or 2

1 Red2 Yellow3 Green

Set indicator state:0 Display state1 Set forced state2*Set nonforced state

Set forced state:1 On2 Off

5,9,u,4,1-3

5,9,u,4,1-3,1

5,9,u,3,1-2

EIU nx64k Unit Controls:0 Display controls1 Controls to normal

4 Forced indication3 Loop to equipment (WAN)



EIU nx64k Settings:0 Display settings

3 Channel settings4 Slip alarm limit5 Loopback time limit7 A/D Calibration

Sel. chan.:1 or 2

Display EIU Settings:1 All unit settings2 Channel settings3 Common settings

Slip limit:0 Display limit1 Set limit

Set limit slips/min.:

SETTINGS:

Give measured supplyvoltage without sign:(4000...6000 mV)

Set limit:

6,9,u

1 Set defaults

8 Read/load settings

6,9,u,0

6,9,u,3

6,9,u,5

6,9,u,7

6,9,u,4

6,9,u,0,2

6,9,u,4,1-2

6,9,u,4,1-2,1

6,9,u,5,1

6,9,u,7,2

1...255 slips/min

1...254 minutes255 = No time limit

6,9,u,1

Are you sure?99 Set defaults

6,9,u,8

Read/load Settings:0 Display setup ID1 Read from Unit2,* Load to Unit

(* = <DATA>)

Loopback time limit:0 Display limit

Set limit1

Select voltage:2 + 5 V

1 Tx buffer2 Rx buffer3 Error-free minute

Slip alarm limit:

Sel. chan.:1 or 2

Error-free minute:0 Display1* Enable2

6,9,u,4,3

Disable

1) Menu path continues.See the following pages.

9 Cross-connection *

* On TU 21133.02 only

6,9,u,9

Cross-connection:0 Display1 Enable2 * Disable



Time slot selection:

Select channel:1 or 2

6,9,uChannel state:0 Display

Channel in useChannel not in use

12*

Rate and time slot selection:0 Display

Set rate and time slots1

LAN interface mode:0 Display mode

TP full-duplexTP half-duplex

12*

WAN compression mode:0 Display mode1 Enable Enhanced Tinygram mode2* Disable compression

LAN filtering mode:0 Display mode1 Enable filtering2* Disable filtering

6,9,u,3,n,1

6,9,u,3,n,2

6,9,u,3,n,3

6,9,u,3,n,4

6,9,u,3,n,5

Select rate:1...31 (*64kbit/s)

6,9,u,3,n,2,16,9,u,3

CHANNEL SETTINGS:

6,9,u,3,n

EIU nx64k Channel settings:1 Channel state

Rate and time slotsLAN interface modeWAN compression modeLAN filtering modeLoss of incoming signal

234567 AIS sending

2 Remove time slots

1 Manual selectionAutom. selection2

6,9,u,3,n,2,1,n

EIU nx64k Settings:0 Display settings1 Set defaults3 Channel settings4 Slip alarm limit5 loopback time limit7 A/D Calibration

6,9,u,3,n,2,1,n,1

6,9,u,3,n,2,1,n,2


Give time slot:1...31

Give starting time slot:1...31

Loss of incoming signal:0 Display state1 Enable alarm2* Disable alarm

6,9,u,3,n,6

6,9,u,3,n,7AIS sending permission:0 Display state1 Enable AIS to WAN2* Disable AIS to WAN

Select channel:1 Channel a2 Channel b

6,9,u,3,n,6,1-2

On TU 21133.02 only1)

1)

2)

2)On TU21133.01 only8 WAN idle signal

6,9,u,3,n,8WAN idle signal0 Display1* 011111102 11111111



5.2 General

The EIU unit is controlled with the Service Terminal or TransmissionManagement System TMS (see the corresponding operating manuals). TheService Terminal or TMS can be used for performing basic settings of theequipment and storing them into a non-volatile storage (replaces jumper settings),performing maintenance-related functions, for example loopbacks, and readingidentifications, statistics and other information from the equipment.

MEASUREMENTS:

EIU nx64k Measurements:


EIU nx64k Testing:Read 8 byte

Give address:0,...,65535

TESTING

Voltage measurements:2 + 5 V

2

7,9,u 7,9,u,1

0 Fault display

9,9,u

STATISTICS:

EIU nx64k Statistics:

8,9,u

2)2) Not implemented

9,9,u,2



Figure 21. Service Terminal keys

Command parameter separator

Service Terminal functions are menu-driven. Menu levels can be bypassed if youknow the required command strings. Command parameters are separated fromeach other with the , key.

For example, if 6,9,3,0,2,1 is given at the main level, settings of channel 1 aredisplayed on the Service Terminal. In the example, the unit is installed in unitlocation 3.

5.3 Service Terminal main menu

When the Service Terminal is switched on, it shifts into the Use ofequipment/Select operation mode, which is the factory setting. The main menucommon to all equipment, offered by the Service Terminal, is displayed:

ONOFF

Select operation:1 Fault display2 Local alarm cancel3 Reset local cancel

DATA

AUTO

F1MODE

F2OBJ

F3TOP UP

HELP >...

STO RCL DEF

D E FINV

A B CDEL

EXP . #RET,0-

7 8 9 ASCII

4 5 6

1 2 3

F4



1 Fault display

The fault display indicates the fault situation of the equipment. The informationcontained in the fault data includes:

• equipment ID (for example, DM 2 ABC)

• fault category (A, B, D, S or combination of these)

• control block indicating the fault

• fault type.

You can set the equipment ID in the Identifications menu. The fault display isnot related just to one unit, it concerns the entire equipment.

2 Local alarm cancel

In a fault situation, the Local alarm cancel option cancels rack alarms A and B.As a reminder of cancelling, a D-alarm is given. Cancelling without a faultsituation produces a B-alarm. The Local alarm cancel option concerns the entireequipment.

3 Reset local cancel

The normal situation is restored in the equipment.

4 Identifications

Under this function, you can read the equipment identifying data, such as theequipment type, name given to it and the type and version of the program used.You can modify some of these identifications.

Select operation:

1 Fault display

2 Local alarm cancel

3 Reset local cancel

4 Identifications

5 Controls (temporary)

6 Settings (permanent)

7 Measurements

8 Statistics

9 Testing

10 User privileges

11 Miscellaneous



5 Controls (temporary)

Under this function, you can give controls that temporarily change the operatingmode of the equipment. Such controls are, for example, interface loopbacks.

6 Settings (permanent)

Settings determine the operating mode of the equipment. They are retained in theequipment storage also during a power outage.

7 Measurements

This function allows you to make various measurements, which the equipmentperforms itself, for example voltage measurements.

8 Statistics

There are no statistics functions in use in this unit.

9 Testing

Automatic tests performed by the equipment itself.

10 User privileges

This menu item allows you to perform protective functions for the equipment.Some of the equipment facilities can be protected (for example, Settings). Youcan give the equipment a password that you must known if you want to modifyprotected facilities. A single unit has no protective functions of its own.

11 Miscellaneous

This function covers the functions unsuitable for other classification (not yet inuse).

Access to unit

Since the EIU unit is not provided with a service interface of its own, servicefunctions must be directed to the EIU unit via the main unit (DYNACARD-MUX). First, select the main level menu (4...9), then 9 followed by a comma, andfinally the unit number: 4...9,9,unit. Unit numbering starts from 1 on the left.Now the menu of the unit concerned, below the main level, is displayed.

5.4 Ethernet Interface Unit menus

The EIU unit is controlled via the service interface in the main unit(DYNACARD-MUX). The main unit provides the menus related to the commonsection of the equipment, and via the menus offered by it, you can select aparticular unit as an object. The EIU unit provides the menus required for itscontrol.



5.4.1 Fault display

The main unit collects fault data from other units into a common fault storage. Atthe initialisation stage, the main unit collects from each unit the fault-related data:faults that are active in the unit, their effect on alarm outputs, the fault code relatedto each fault, the way the fault is indicated (colour of the indicator), and the nameof the control block.

The main unit generates a response to the fault inquiry. This response contains thefollowing information:

• equipment ID (equipment name)

• fault status

• fault data:

- faulty object- fault type (fault code).

Example: *02A (ABS)

MUX-2M unit 1:

• incoming 2M missing

nx64k unit 3:

• power supply fault

The equipment, named 02A, has alarms A, B and S active. Fault messages comefrom the equipment interface 1 control block (unit 1), the fault being that theincoming 2 Mbit/s signal is missing, and from the control block of the nx64k EIUunit (unit 3), the fault being a power supply fault.

The nx64k EIU unit contains one control block and equipment interface.

Faults controlled in the EIU unit

• Power supply fault

• Forced indication

• Equipment fault (the A/D converter of HC11 does not function)

• Equipment reset

• Loop to equipment

• Buffer overflow (2 Mbit/s transmit and receiving clocks are notsynchronised)

• Installation fault



• Loss of incoming signal (Link integrity fault)

• Blocked from use.

5.4.2 Identifications

4,9,u EIU nx64k Identifications

In the menu, options 3, 5 and 6 display the equipment identifications. Option 7allows you to modify the ID under option 5.

4,9,u,3 User manual

This menu item displays the sales item of the EIU unit's Operating manual. Theresponse is fixed. An example:

4,9,u,5 Hardware ID

Unit type designation and version designation. Set at the factory, but you canchange it, for example, in connection with a repair. A response example:

4,9,u,6 Program version

Program type and version; fixed. A response example:

EIU nx64k Identifications:

3 User manual

5 Hardware ID

6 Program version

7 Modify IDs

C33990.20

TU 21133.01 01A

TS 25442.01 03A



4,9,u,7 Modify IDs

Option 5 displays the menu:

Option 0 displays the type designation and version, and option 1 produces aprompt:

When you use the Service Terminal, you must give the letters contained in thenew type designation in the ASCII format. For example, you can obtain the letterT by selecting:

5.4.3 Controls (temporary)

5,9,u EIU nx64k Unit Controls

5,9,u,0 Display controls

This option displays all the controls set on in the unit. A response example:

Modify IDs:

5 Hardware ID

Identification:

0 Display

1 Modify

Give new ID:

1-15 characters

5 4 ASCII

EIU nx64k Unit Controls:

0 Display controls

1 Controls to normal

3 Loop to equipment (WAN)

4 Forced indication



5,9,u,1 Controls to normal

Forces all EIU unit controls to normal state (cancels loops and forced controls ofthe indicators).

5,9,u,3 Loop to equipment (WAN)

In an equipment loopback, the output signal of the equipment is connected backto the WAN before line buffers. All time slots of the selected channel are loopedas they are. This loop can only be used when a 2048 Mbit/s telecom analyser isconnected to the MUX. The actual Ethernet transmission can not be looped back.

This options displays the following menu:

Both selections display the menu:

Option 0 displays the state of the loopback on the channel. A response example:

By option 1, you can set the selected loop on for the selected channel. Selectionof the option causes a B-alarm and a fault message about the loopback to be givento the MUX unit. If you set an equipment loopback on, transmission to theEthernet port is cut.

On chan :1

Loop to equipment (WAN)

On chan :2

No loop

Red indicator is in forced on state

Sel. chan.:

1 or 2

Loop to equipment (WAN):

0 Display loop state

1 Set loop on

2 Remove loop

Channel 1: Loop to MUX on



Option 2 allows you to cancel the selected loopback from the selected channel.

5,9,u,4 Forced indication

All options display the following menu:

Option 0 displays the state of the forced control of the selected indicator. Aresponse example:

Option 2 cancels the forced control of the selected indicator, after which theindication is determined by a fault situation and MUX commands.


Option 1 turns the selected indicator on and generates a B-alarm and a faultmessage about the forced indication.

Option 2 turns the selected indicator off and generates a B-alarm and a faultmessage about the forced indication.

Select indicator:

1 Red

2 Yellow

3 Green

Set indicator state:

0 Display state

1 Set forced state

2*Set nonforced state

Red indicator is in forced ON state

Set forced state:

1 On

2 Off



5.4.4 Settings (permanent)

Settings determine the operating mode of the equipment. The settings are retainedalso during a power outage.

6,9,u EIU nx64k Settings

The selection 6,9,u on the main level displays the settings' main menu:

6,9,u,0 Display settings

Option 1 displays the channel states and the time slots allocated for them.


The state of the selected channel, as well as the transmission rate and the timeslots allocated are displayed.

Option 3 displays the slip alarm limits of the receive and transmit buffers and thetime limits of the test and measurement loopback.

EIU nx64k Settings:

0 Display settings

1 Set defaults

3 Channel settings

4 Slip alarm limit

5 Loopback time limit

7 A/D Calibration


9 Cross-connection (on TU 21133.02 only)

Display EIU settings:

1 All unit settings

2 Channel settings

3 Common settings

Sel. chan.:

1 or 2



6,9,u,1 Set defaults

The program responds by displaying a new menu:

The default settings are:

6,9,u,3 Channel settings

Both selections display the following menu:

Are you sure?

99 Set defaults

Receive buffer slip alarm limit 10 slips/min.

Transmit buffer slip alarm limit 10 slips/min.

Loopback time limit 5 minutes

Transmission rate 1 x 64 kbit/s

Time slot 1 on channel 1

2 on channel 2

LAN interface mode Half-duplex

WAN compression mode Disabled

LAN filtering mode Disabled

AIS sending to WAN Disabled

Loss of incoming signal alarm Disabled

Cross-connection Disabled

WAN idle signal 01111110

Sel. chan.: 1 or 2



6,9,u,3,n,1 Channel state

Option 0 displays the channel state.

By option 1, you can request the MUX unit to set the time slots allocated for thechannel into use. If any of the requested time slots is already in use, the commandis not executed and a message on overlapping time slots is sent back to the ServiceTerminal.

Option 2 allows you to request the MUX unit to take out of use the time slots usedcurrently on the channel.

6,9,u,3,n,2 Rate and time slots

Option 0 displays the time slots allocated and the transmission rate for the WANchannel.


EIU nx64k Channel Settings:

1 Channel state

2 Rate and time slots

3 LAN interface mode

4 WAN compression mode

5 LAN filtering mode

6 Loss of incoming signal

7 AIS sending

8 WAN idle signal

Channel state:

0 Display

1 Channel in use

2*Channel not in use

Rate and time slot selection:

0 Display

1 Set rate and time slots

2 Remove time slots



Selected transmission rate is the rate for the WAN side link. Transmission rate isn x 64 kbit/s and there must be n pcs free time slots.

After the transmission rate has been entered, the following menu is displayed:

When the Manual selection option is chosen, the following menu is displayed:

Time slots are entered in this menu. Time slot 0 and the time slots alreadyallocated for other channels cannot be entered. The time slots allocated earlier forthe channel in question are automatically deallocated.

When the Autom. selection option is chosen, the following menu is displayed:

Time slots are automatically selected from the given time slot or the nextunallocated one onwards. As a result, the selected number of unallocated timeslots, starting from the given one, are allocated.

If the number of unallocated time slots is not sufficient, time slot allocation is notperformed. In such a situation, the following message is given:

Select rate:

1...31 (*64 kbit/s)

Time slot selection:

1 Manual selection

2 Autom. selection

Give time slot:

1...31

Give starting time slot:

1...31

Number of free TSs from given starting TS is insufficient



In this case, time slots are not allocated. Time slot 16 can be allocated both in themanual and automatic selection if signalling has been set out of use in the DM 2-MUX unit. Allocation of time slots succeeds only if the channel is not in use.

Option 2 (6,9,u,3,n,2,2) deallocates all time slots. This selection is enabled onlyif the channel is not in use.

6,9,u,3,n,3 LAN interface mode (on TU 21133.01 only)

Option 0 displays the LAN interface mode.

Option 1 allows you to enable the TP full-duplex mode for the LAN interface.

Option 2 allows you to enable the TP half-duplex mode for the LAN interface.

Half-duplex is a regular 10Base-T LAN mode with a transmission speed of 10Mbit/s. Full-duplex transmission speed is 20 Mbit/s and if it is selected, theremust be the full-duplex support also at the other end of the LAN.

6,9,u,3,n,4 WAN compression mode

Option 0 displays the WAN compression mode.

Option 1 allows you to enable the WAN compression. The enhanced tinygramcompression increases data throughput. The padding bits inserted in sub-64-byteframes are stripped off.

By option 2, you can disable the WAN compression. Frames from the LAN aretransmitted over the WAN as they are.

The WAN compression mode selected must be the same at both ends of thetransmission line.

LAN interface mode:

0 Display mode

1 TP full-duplex

2*TP half-duplex

WAN compression mode:

0 Display mode

1 Enable Enhanced Tinygram mode

2*Disable compression



6,9,u,3,n,5 LAN filtering mode

The EIU unit supports bridging at the MAC level and it is tranparent to higherlevel protocols. EIU learns automatically all addresses of the LAN it is connectedto. Only broadcasts, multicasts and frames destinated to another LAN areforwarded to the WAN.

The EIU unit's LAN table can store up to 10000 addresses and this table isautomatically updated. EIU deletes an address if after 5 minutes no frames havebeen received from that station. This feature is useful for extending the physicallimits of the network without incurring penalties associated with the use ofrepeaters.

Option 0 displays the LAN filtering mode.

Option 1 allows you to enable the LAN filtering.

By option 2, you can disable the LAN filtering. In this case, the LAN filtering isdisabled and all frames are transmitted transparently.

6,9,u,3,n,6 Loss of incoming signal

Option 0 displays whether the 'Loss of incoming signal' alarm is generated in thecase of a link integrity fault. The link integrity fault occurs if there is no cableconnected to another Ethernet equipment or the transmission and receive pins arecross-connected in an incorrect way.

Option 1 enables the 'Loss of incoming signal' alarm.

Option 2 disables the alarm.

LAN filtering mode:

0 Display mode

1 Enable filtering

2*Disable filtering

Loss of incoming signal:

0 Display

1 *Enable alarm

2 Disable alarm



6,9,u,3,n,6,1-2 (on TU 21133.02 only)

Using this menu, you can enable or disable the 'Loss of incoming signal' alarmseparately for both Ethernet ports.

6,9,u,3,n,7 AIS sending

Option 0 displays whether sending of the AIS signal to the WAN is enabled.

Option 1 enables sending of the AIS signal to the WAN. AIS sending occurs ifthere is an equipment fault or the buffer alarm limit is exceeded.

Option 2 disables AIS sending in such fault situations which would normallyrequire AIS to be sent.

6,9,u,3,n,8 WAN idle signal

Option 0 displays whether EIU sends signal 01111110 or 11111111 to WAN inthe idle state when there is no frames to be sent from LAN to WAN.

Option 1 selects the idle signal as 01111110. This is the normal mode in point-to-point connections. Signal 01111110 is the HDLC flag sequence. Each framebegins with a flag sequence. If there is no frames to be sent, signal 01111110 issent continuously.

Option 2 selects the idle signal as 11111111. In this mode, you can connectseveral EIUs to the same time slot by using the digital common channel featureoffered by the DN 2 or DB 2 equipment.

Select channel:

1 Channel a

2 Channel b

AIS sending permission:

0 Display state

1 Enable AIS to WAN

2*Disable AIS to WAN

WAN idle signal

0 Display

1*01111110

2 11111111



EIU does not control connections to WAN and if more than one unit transfer datato WAN simultaneously, errors may occur. In this mode, there is about 10 msextra delay in the transfer.

6,9,u,4 Slip alarm limit

Slips are measured between the 2 Mbit/s transmit and 2 Mbit/s receiving clocks.

This menu allows you to select the buffer whose alarm limit is to be displayed orset. Options 1 and 2 display the menu:

Option 0 displays the alarm limit currently in use, and option 1 displays the menufor setting the alarm limit:

This menu is used to set a slip alarm limit for the buffer selected earlier. If thislimit is exceeded, a fault message is sent to the MUX. The AIS is sent to the WAN(if enabled) when there is an over-/underflow in the receive buffer. A B-alarm isalso given.

Option 3 displays the following menu:

Option 0 displays whether the error-free minute is enabled or disabled.

Slip alarm limit:

1 Tx buffer

2 Rx buffer

3 Error-free minute

Slip limit:

0 Display limit

1 Set limit

Set limit slips/min.:

1...255 slips/min

Error-free minute:

0 Display

1 *Enable

2 Disable



Option 1 allows you to enable the error-free minute. In case of a buffer overflow,the alarm is set off if the slip limit has not been exceeded during the one-minutecounting period after data recovery. The alarm may stay on for about 1 to 2minutes after the data recovery.

By option 2, you can disable the error-free minute. In case of a buffer overflow,the alarm is set off if the slip limit has not been exceeded after data recovery. Thealarm may stay on max. one minute after the data recovery.

6,9,u,5 Loopback time limit

Option 0 displays the time limit, and option 1 displays the following menu:

This menu is used to set a time limit. If this limit is exceeded, the measurementloop is automatically set off. If the time limit is set to 255, you have to set theloopbacks off manually in the Controls menu (5,9,u,1-3).

6,9,u,7 A/D Calibration

In this menu, you can select a voltage to be calibrated. The selection displays thefollowing menu:

Calibration is performed to each voltage in connection with testing and it isperformed again only if the processor or the voltage reference circuit is replaced.

Loopback time limit:

0 Display limit

1 Set limit

Set limit:

1...254 minutes

255 = No time limit

Select voltage:

2 +5 V

Give measured supply

voltage without sign:

(4000...6000 mV)



Note

6,9,u,8 Read/load settings

The unit responds with a new menu:

Option 0 displays the unit setup ID which differs according to the typedesignation. The setup ID is used when interchangeability of the unit settings isdefined. Settings can be copied between only such units that have the same ID.

By option 1, you can read the unit settings into the Service Terminal/TMS buffer.

By selecting 2,*, the settings contained in the buffer are saved to a unit, providedthat the setup ID and the length of settings are the same as the corresponding oldsettings in the unit. You must make the selection 2,* immediately after selection1.

If the settings cannot be saved to the unit, the unit displays the text Functionalerror. If the settings are properly saved, the unit responds with the text done andresets the program after three seconds. Before the new settings are saved to theunit, we recommend that the unit is provided with the default settings (command6,9,u,1,1).

An example of reading and loading settings: Units in locations 3 and 4. Read thesettings from unit 3 and load them to unit 4.

When the settings are read from a unit and saved to another one, channels mustbe out of use.

Read/load Settings:

0 Display setup ID

1 Read from unit

2,* Load to unit (* = <DATA>)

6,9,4,1,1 /* Default settings in unit 4 */

6,9,3,8,1 /* Read the settings from unit 3 */

TOP /* Go to the top menu */

6,9,4,8,2,* /* Load the settings to unit 4 */

/* The unit will be reset in 3 seconds */



6,9,u,9 Cross-connection (on TU 21133.02 only)

Option 0 displays the state of the cross-connection.

By option 1, you can enable the cross-connection switch to connect channels 1and 2 together for point-to-multipoint applications. When the cross-connection isenabled, there are four local Ethernet ports and two remote ports over the WAN.

Option 2 disables the cross-connection.

5.4.5 Measurements

7,9,u EIU nx64k Measurements

Option 0 is a fault display which shows the reason of channel-specific alarms thatmay occur.

Selection of option 1 or 2 displays a new menu related to the function.

7,9,u,1 Voltage measurements

Option 2 displays the current value of the +5 voltage.

5.4.6 Statistics

8,9,u EIU nx64k Statistics

The EIU unit has no statistical functions.

Cross-connection:

0 Display

1 Enable

2 *Disable

EIU nx64k measurements:

0 Fault display


Voltage measurements:

2 +5 V



5.4.7 Testing

9,9,u EIU nx64k Testing

9,9,u,2 Read 8 bytes

After the address has been entered, the contents of eight memory locations,starting from the address selected, are displayed on the Service Terminal.

EIU nx64k Testing:

2 Read 8 byte

Give address:

0 ... 65535


Glossary

Terms and abbreviations

A/D Analogue-Digital

ACM2 Nokia's 2 Mbit/s Access Multiplexer

AIS Alarm Indication Signal. Signal that replaces the normal traffic signal when amaintenance alarm indication has been activated. In pulse code modulation(PCM) the alarm indication signal is a continuous string of "ones".

CAT5 Twisted pair cable, category 5

Collision In a data transmission system, the situation that occurs when two or moredemands are made simultaneously on equipment that can handle only one at anygiven instant.

A normal situation in the half-duplex Ethernet, in which there are more than onestation. A collision occurs when two or more stations transmit at the same time.

CPE Customer Premises Equipment

DB2 2 Mbit/s Digital Branching equipment

DIC Data Interface Controller

DM2 Nokia’s fourth generation primary multiplex equipment

DN2 2 Mbit/s Dynamic Node

DNT2M 2 Mbit/s line terminal at the customer side

DXC Digital Cross-connection

E1 European Digital Signal 1. European PCM system that carries 32 channels in a256-bit frame transmitted at 2.048 Mbit/s basic multiplex rate.

EMC Electromagnetic compatibility

HDLC High-level data link control protocol. A bit-oriented synchronous data link layerprotocol governing the exchange of data over a single communication link.

ID Identification

ISDN Integrated Services Digital Network

LAN Local Area Network

LED Light Emitting Diode



MAC Medium Access Control. A local network control protocol that governs stationaccess to a shared transmission medium.

MUX Multiplexer unit

ND Nokia Digital transmission equipment

PC Personal Computer

PLL Phase Locked Loop. Circuit where the phase of an oscillator signal is forced tofollow exactly the phase of a reference signal.

POTS Plain Old Telephone Service

RFC Request for Comments. The document series, begun in 1969, which describe theInternet suite of protocols and related experiments. Not all RFCs describe Internetstandards, but all Internet standards are written up as RFCs.

RJ45 RJ45 connector. An eight-pin connector used for data transmission over astandard telephone wire.

S/FTP A shielded twisted pair cable with aluminium foil and stranded braid.

TDM Time-division multiplexing. A multiplexing technique in which two or morelower bandwidth communications channels are combined into a higherbandwidth channel by allocating frequency time slots in turn to each of the lowerbandwidth communications.

TM4 Construction Practice for ND equipment products

TMS Transmission Management System

TP Twisted Pair

TS Time slot

WAN Wide Area Network


TU21133 Ethernet

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