FIU19_EC34231.89--D0

7/28/2019 FIU19_EC34231.89--D0

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FIU 19E Indoor Unit

C34231.89--D0

DN0170994 © Nokia Corporation 1 (25)

Issue 4-0 en Nokia Proprietary and Confidential

Quick Reference Guide

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2 (25) © Nokia Corporation DN0170994

Nokia Proprietary and Confidential Issue4-0en

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 2002. All rights reserved.

Hereby, Nokia Corporation, declares that this Nokia FIU 19E indoor unit is in compliance with

the essential protection requirements for EMC (as stated in Article 4 of Council Directive

89/336/EEC) specified under the article 3.1b of Council Directive 1999/5/EC (R&TTE Directive).

Type approval information has been printed in the sticker on top of the FIU 19E main unit.

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1. Contents of this guide



1. Contents of this guide

This guide is a quick reference for the installation of the FIU 19E indoor unit. Theguide also includes a short commissioning task list. The guide contains the

following information:

• Section 2: warnings

• Section 3: contents of the transport packages

• Section 4: installation instructions

• Section 5: connector pinouts

• Section 6: commissioning task list and LED indicators.

Complete installation and commissioning instructions can be found in Nokia

FlexiHopper Microwave Radio with FIU 19/ FIU 19E/ RRIC User Manual or Nokia MetroHopper Radio with FIU 19/ FIU 19E/ RRIC User Manual.

Figure 1. FIU 19 and FIU 19E indoor units

2. Warnings

This guide does not cover everything but is intended for persons already familiarwith the equipment. For complete instructions, read the user manual. Especiallysee Warnings and cautions section of the installation documents for any warningsthat apply.

MP Q1-1 FB1 +DCLMP Q1-2 FB2 +DCPWR - +

FIU 19

FIU 19E

MP Q1-1 FB1 +DCLMP - + Q1-2 FB2 +DCPWR

10BaseT

FIU 19E

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Note

Note

3. Contents of the transport packages

All the equipment and tools needed in basic installation are included in theproduct packages. Flexbus and 2M cables or necessary connector sets must be

purchased separately.

Nokia Hopper Manager software and a suitable manager cable (T55270.10 FIU19E LMP Cable RJ45-D9F 3 m) are needed for commissioning the FIU 19Eproduct locally. Also, these items must be purchased separately.

Figure 2. FIU 19E LMP Cable connection

The torx driver is included in the Tool kit, not in the product package.

Before installation, verify that you have the correct equipment and tools.Different alternatives of the FIU 19E transport packages are shown in Figures 3and 4.

1 nc2 RD3 TD4 nc5 GND6 nc7 nc8 nc9 nc

D9 (female) on the cableRJ-45 on front of FIU 19E

GND = groundRD = received data

TD = transmitted datanc = not connected

GND

LMP outLMP in

4

56

1-3, 7-8 nc

12345

6789

1 83 4 5 6 72

LMP-port

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3.1 FIU 19E basic configuration set



Note

3.1 FIU 19E basic configuration set

Remember to order all necessary plug-in units also, for example:

• T55220.02: FIU 19 4x2M 75 SMB Plug-In Unit

• T55220.03: FIU 19 4x2M 120 RJ-45 Plug-In Unit

For 16x2M 1+0 you have to order a main unit and a suitable upgrade kit(T55246.4x).

Figure 3. FIU 19E 0x2M 1+0 transport package

Table 1. Configuration set for 4-12x2M 1+0

T55340.01 FIU 19E 0x2M 1+0

Allen key

- Nuts and screws- Power cable

Identification strip(pull out)

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Note

3.2 FIU 19E complementary sets

These are the same upgrade sets that are available for FIU 19.

Table 2. Configuration sets for 16x2M 1+1

T55340.81 FIU 19E 16x2M 1+1 75 SMBT55340.82 FIU 19E 16x2M 1+1 120 RJ-45

Table 3. Contents of the FIU 19E basic configuration packages

Part T55340.xx

.01 .81 .82

FIU 19E Main Unit 48/60 VDC 1 2 2

FIU 19 Mounting Kit for 4-12x2M 1+0: Mounting brackets(attached), rack nuts and screws

1

Power Cable Molex (2.5 m) E10014229 1 2 2

5 mm Allen key 1 1 1

Filler Plate (installed) 3 6 6

FIU 19 16x2M IC Plug-In Unit (installed) 2 2

Backplane 1+1 1 1

FIU 19 Mounting Kit for 16x2M 1+1:

Slim mounting brackets for main units (attached), mounting

brackets for 16x2M 1+1, rack nuts and screws

1 1

FIU 19 EXU 16x2M 75 SMB 1

FIU 19 EXU 16x2M 120 RJ-45 1

Table 4. Upgrade for 4-12x2M 1+0 to 16x2M 1+0 alternatives

T55246.41 FIU 19 UPG for 4-12x2M 1+0 75 SMB

T55246.42 FIU 19 UPG for 4-12x2M 1+0 120 RJ-45

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3.2 FIU 19E complementary sets



Figure 4. FIU 19 UPG for 4-12x2M transport package

Allen key

- Nuts and screws- Power cable

Slim mounting brackets

Backplane

Fillerplates

mounting

brackets

16x2M

16x2M EXU (75 or 120 )

Depends onthe connectortype (75/120 )

Table 5. Upgrade for 16x2M 1+0 to 1+1

T55340.61 FIU 19E UPG for 16x2M 1+0 to 1+1

Table 6. Upgrade for 4-12x2M 1+0 to 16x2M 1+1 alternatives

T55340.91 FIU 19E UPG to 16x2M 1+1 75 SMB

T55340.92 FIU 19E UPG to 16x2M 1+1 120 RJ-45

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The Flexbus Plug-In Unit package includes the additional power cable(E10014480) for the plug-in unit.

Table 7. Contents of the FIU 19 16x2M upgrade packages

Part T55246.xx T55340.xx.41 .42 .61 .91 .92

FIU 19E Main Unit 48/60 VDC 1 1 1

Power Cable Molex (2.5 m) E10014229 1 1 1

5 mm Allen key 1 1 1 1 1

Filler Plate (Installed) 1 1 3 3 3

Filler Plate 3 3 3 3

Backplane 1+0 1 1

Backplane 1+1 1 1 1

FIU 19 16x2M IC Plug-In Unit (installed) 1 1 2 2

FIU 19 16x2M IC Plug-In Unit 1

FIU 19 Mounting Kit for 16x2M 1+0: Slim mounting

brackets for main unit, mounting brackets for

16x2M 1+0, rack nuts and screws

1 1

FIU 19 Mounting Kit for 16x2M 1+1: Slim mounting

brackets for main units, mounting brackets for

16x2M 1+1, rack nuts and screws

1 1 1

FIU 19 EXU 16x2M 75 SMB 1 1

FIU 19 EXU 16x2M 120 RJ-45 1 1

Table 8. Plug-in units

T55220.02 FIU 19 4x2M 75 SMB Plug-In Unit

T55220.03 FIU 19 4x2M 120 RJ-45 Plug-In Unit

T55221.01 FIU 19 Flexbus Plug-In Unit

T55223.01 FIU 19 Aux Data Plug-In UnitT55320.01 FIU 19E Ethernet Plug-In Unit

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4. Installation



4. Installation

To install FIU 19E with 4 - 12x2M capacity (1+0)

• Mount the indoor unit to the rack with four mounting nuts and screws.Tighten the screws with a 5 mm Allen key.

Figure 5. Installing FIU 19E 4 - 12x2M 1+0

Table 9. Mounting kits

T55241.04 FIU 19 Mounting Kit for TM4 RackT55241.05 FIU 19 Mounting Kit for ETSI Rack

5 mm

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To install FIU 19E with 16x2M capacity (1+0)

1. Screw the left and right side mounting brackets to the wanted depth withtwo M3x10 Torx screws each.

2. Screw the backplane guide pin to its place. Fix the backplane to theexpansion unit with four Torx screws.

3. (When applicable) Replace the normal 1U mounting brackets of the mainunit with slim brackets. Use the same Torx screws that were used with the1U brackets. The brackets should be, as shown in Figure 6, free hole up,threaded hole down.

4. Remove the cover plate from the back of the main unit.

5. Put the rack mounting nuts (6 pcs) to the rack and fix the assembly to therack with four screws, first through the lowest bracket holes (Figure 6).Tighten the screws with a 5 mm Allen key.

6. Slide the main unit gently toits place above the expansion unit. Fixit to therack with two remaining screws.

When removing units, follow the installation steps in reverse order.

When a main unit is removed from the expansion unit, the two threadedholes in the slim main unit brackets can be used as ejectors. First remove

the screws and drive the same screws into these threaded holes. Tighteningthese screws pushes the main unit free from the backplane.

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4. Installation



Figure 6. Installing FIU 19E 16x2M 1+0 in a 19–inch rack phases 1–6

Phases 1 - 2

Phases 3 - 5

3

4

5

5

4

1 2

1

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Note

To install FIU 19E with 16x2M capacity and 1+1 protection

1. Screwthe leftand rightside mounting bracketto the wanted depth withtwoM3x10 Torx screws each.

2. Screw the backplane guide pins to their places (Figure 7). Screw thebackplane to the expansion unit with four Torx screws.

3. (When applicable) Replace the normal 1U mounting brackets of the mainunits with slim brackets. Use the same Torx screws that were used with the1U brackets. The brackets should be, as shown in Figure 7, free hole up(upper unit) or down (lower unit).

4. Remove the cover plates from the back of the main units.

5. Put the rack mounting nuts (8 pcs) to the rack and fix the assembly to therack with four screws, first through the second lowest bracket holes.Tighten the screws with a 5 mm Allen key.

6. Slide the main units gently to their places. Fix them to the rack with theremaining screws (two each).

The expansion unit has to be installed in the middle of the backplane.

When removing units, follow the installation steps in reverse order.

When a main unit is removed from the expansion unit, the two threadedholes in the slim main unit brackets can be used as ejectors. First removethe screws and drive the same screws into these threaded holes. Tighteningthese screws pushes the main unit free from the backplane.

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4. Installation



Figure 7. Installing FIU 19E in 16x2M 1+1 in a 19-inch rack, phases 1–6

Phases 1 - 2

Phases 3 - 5

Mounting bracket for16 x 2M 1+1 assembly

Backplane 1+1

Upper guide pin

M3x10 Torx

EXU Plug-In Unit slot A:

FIU 19 16x2M IC Plug-In Unit

EXU Plug-In Unit slot B:FIU 19 16x2M IC Plug-In Unit

Lower guide pin

M3x10Torx

Cover plate (removed)Slim main unitmounting bracket

Expansion unit

Upper main unit

Lower main unitSecondlowest hole

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To mount FIU 19E to 600x300 ETSI rack

• Fix the left and right ETSI mounting brackets to the rack using twomounting nuts and screws each.

Figure 8. Installing the ETSI mounting brackets (T55241.05)

Example of installing FIU 19E (with 4 - 12x2M capacity) in the ETSI mountingbrackets is shown in Figure 8.

To install FIU 19E in the ETSI mounting brackets, follow the instructions in thefirst two task sequences. Put the unit(s) to the rack as pictured in Figure 8. Ignorethe use of mounting nuts. They are not needed in this installation.

For more detailed information on installation, refer to Nokia FlexiHopper Microwave Radio with FIU 19/ FIU 19E/ RRIC User Manual or Nokia MetroHopper Radio with FIU 19/ FIU 19E/ RRIC User Manual.

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4. Installation



To mount FIU 19E to TM4 Rack

1. Place the upper and lower supports as shown in Figure 9a. 14 holes are leftbetween the supports.

2. Fix the upper and lower supports to the rack using four M4x10 Phillipsscrews each.

Figure 9. Installing the TM4 mounting adapter (T55241.04)

Example of installing FIU 19E (with 4 - 12x2M capacity) in the TM4 mountingadapter is shown in Figure 9b. To install FIU 19E in the TM4 mounting adapter,follow the instructions in the first two task sequences. Put the unit(s) to the rack as pictured in Figure 9b. Ignore the use of mounting nuts. They are not needed inthis installation.

310 mm

11 U

482.6 mm(19" )

14holes

a) b)

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Caution

5. Connecting interfaces

For detailed signal descriptions and pin orders, refer to Nokia FlexiHopper Microwave Radio with FIU 19/ FIU 19E/ RRIC User Manual or Nokia

MetroHopper Radio with FIU 19/ FIU 19E/ RRIC User Manual.

Connect the cables in the following order:

1. Q1 / LAN cables and 2 Mbit/s interface cables

2. Flexbus cables

3. Power cables.

Never connect or disconnect the Flexbus cable when the power is on. Damage tothe equipment may result. Ensure that the Flexbus LED is not on or blinking. Thepower can be switched off using the manager software.

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5.1 Main unit



5.1 Main unit

Figure 10. Interfaces and plug-in unit slots of the main unit

MP

SMB connector

MP Q1-1 FB1 +DCLMP - + Q1-2 FB2 +DCPWR 10BaseT

Slot 1 Slot 2 Slot 3

4 x 2M plug-in units

Flexbus plug-in unit

Aux data plug-in units

LMP

RJ-45 connector

4 GND

5 LMP in

6 LMP out

FB1 +DC FB2 +DC

TNC connector

PWR - + Power supply input of-40.5 to -72 V DC

12

34 Molex Micro-Fit connector

1 VPB (+)2 VNB (-)3 Not connected4 Not connected

10BaseT Ethernet

RJ-45 connector1 Data out+

2 Data out -

3 Data in+

6 Data in -

Q1-1 Q1-2

RJ-45 connector3 Q1 out +

4 Q1 in+

5 Q1 in -

6 Q1 out -

1 83 4 5 6 72

Ethernet plug-in unit

1 83 4 5 6 72

1 83 4 5 6 72

FIU 19E

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Caution

5.2 4x2M plug-in units and 16x2M expansion unit

Figure 11. Interfaces and plug-in unit slots of the expansion unit; interfaces ofthe 4x2M plug-in units

5.3 Ethernet plug-in unit

Ethernet plug-in unit (T55320.01) is compatible with FIU 19E rel. C2.0(T55340.01--D)hardware (Mainunit T55300.01--B) and software P55306.01--A+ P55330.01--A or newer when Hopper Manager C4.6 or newer is in use.

The unit is not compatible with previous HW or SW versions of FIU 19E.

The installation of the Ethernet plug-in unit is allowed only to slot 2 of FIU 19Emain unit.

Ethernet Plug In Unit (EPIU) is used for transparent Ethernet bridging overmicrowave radio links. One FIU 19E C2.0 equipped with EPIU supports the useof one or two radios for Ethernet traffic. Radio links capacity (2x2M, 4x2M,8x2M or 16x2M) can be shared between E1 and Ethernet traffic with 2 Mbit/sgranularity.

EXU slot A (4A) EXU slot B (4B)

16x2M IC plug-in unit

2M interfaces

2M 120

2

34

1

TQ connector

4

SMB connector

2M 75

1

2

3

In -

In+

Out -

Out+

RJ-45 connector

1

2

Out+

Out -

3, 6 - 8 Not connected

In+4

5 In -

2M 120

1 83 4 5 6 72

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5.3 Ethernet plug-in unit



Caution

Figure 12. Ethernet plug-in unit

The Ethernet plug-in unit is not compatible with equipment providing “Powerover Ethernet”.

Pins (4, 5, 7 and 8) on the Ethernet plug-in unit interfaces (ETH-1/ETH-2) are

terminated to improve noise margin.

There are two green LEDs on the EPIU front panel. These LEDs indicate trafficactivity and Ethernet link status for both Ethernet interfaces. Also, if FIU 19E isin reset status, then the Ethernet plug-in unit is initialised and LEDs will blink once to indicate that initialisation is done. The initialisation of EPIU will takeabout 20 seconds.

No light – Ethernet link status is down, Ethernet cable may be broken or theEthernet interface is disabled.

Continuous green – Ethernet link has been established and the interface is ready

to receive traffic. This is not indicating that the radio link is established correctly.

Blinking green – Indicates that the interface is receiving or transmitting Ethernetpackets, but it is not guaranteed that packets go through the radio link.

ETH-1 ETH-2

10/100 BaseT Ethernet

RJ-45 connector1 Data out+

2 Data out -

3 Data in+

6 Data in -

1 83 4 5 6 72

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Caution

5.4 Flexbus plug-in unit

Negative input voltage is grounded in the plug-in unit. The plug-in unit requiresan external power supply, if positive grounding is used at the equipment station.

Power cable is included in the plug-in unit package. Note that this is not the samecable that is used with the main unit.

T30839.01Power AC/DC 1*100W19”/ETSI 1.5U and T30839.02PowerAC/DC 2*100W 19”/ETSI 1.5 U can be used to supply power to the Flexbus plug-in unit.These power supplies can also be used to supply power to the FIU 19E main unit,when only AC power is available at the site.

T30839.03 Power DC/DC 1*100W 19”/ETSI 1.5 U and T30839.04 Power DC/DC 2*100W 19”/ETSI 1.5 U can be used to supply power to the Flexbus plug-in unit. These power supplies can also be used to supply power to the FIU 19Emain unit, when only DC power is available at the site. DC input voltage range is20 - 75 V.

Figure 13. Flexbus plug-in unit

FB3 FB4 DC IN

+

12

34

DC IN Power supply input of +52 to +60 V DC

1

2

3

4

Molex Micro-Fit connector

not connected

not connected

P55V

N55V = GND

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5.4 Flexbus plug-in unit



Caution

Figure 14. FIU 19E indoor unit power connections

If the positive voltage is grounded on the site, the Flexbus plug-in supply voltagehas to be galvanically isolated.

Grounding

1) Power requirement90W - 2 x OU+1 x FIU19E60W - 1 x OU+1 x FIU19E

2) In Flexbus plug-in unit,negative supply voltageis always grounded

3) In this site, positive supply voltageis grounded. Negative voltage couldbe grounded as well.

Flexbusplug-in unit

Outdoorunit

FB2 +DC

FIU 19E

Flexbus

interface

FB1 +DCFB3FB4

+48...+60 V

+52...+60 V

Power supply FIU 19EFloating input

Power supply secondary side is galvanicallyisolated from primary side

-40.5...-72 V 1)

Mast

2)

3)

Flexbuscables

_+

_

+

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5.5 Aux data plug-in unit

Figure 15. Aux data plug-in unit

Interface Pin Pin name Signal / direction

AS V11ASCK

AF V11I / O

AS RSAFCK

AF703I / O

AS V11ASCK

12345678

GroundASOUTPASOUTNASINPASINNASRXCKPASTXCKPDOUT0

AF V11 I/0 12345678

GroundAFOUTPAFOUTNAFINPAFINNDIO0DIO1DOUT1

AS RSAFCK

12345678

GroundAFTXCKPAFTXCKNAFRXCKPAFRXCKNRXD232TXD232DOUT2

AF703 I/0

V.11 (Aux slow RX +) / outV.11 (Aux slow RX -) / outV.11 (Aux slow TX +) / inV.11 (Aux slow TX -) / outV.11 (Aux slow clock RX direction) / outV.11 (Aux slow clock TX direction) / out+/- Relay control / out

V.11 (Aux fast RX +) / outV.11 (Aux fast RX -) / outV.11 (Aux fast TX +) / inV.11 (Aux fast TX -) / inDigital I/O (TTL) /in/outDigital I/O (TTL) /in/out+/- Relay control / out

V.11 (Aux fast TX direction +) / in/ outV.11 (Aux fast TX direction -) / in/outV.11 (Aux fast RX direction +) / outV.11 (Aux fast RX direction -) / outRS-232 (aux slow RX) / outRS-232 (aux slow TX) / in+/- Relay control / out

12345

678

Ground703RXP703RXN703TXP703TXN

DIO2DIO3DOUT3

G.703 RX 64 kbit/s, coding HDB3 / outG.703 RX 64 kbit/s, coding HDB3 / outG.703 TX 64 kbit/s, coding HDB3 / inG.703 TX 64 kbit/s, coding HDB3 / in

Digital I/O (TTL) / in/outDigital I/O (TTL) / in/out+/- Relay control / out

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6. Commissioning



6. Commissioning

Starting point for commissioning is that the equipment has been installedaccording to the installation instructions.

Most of the commissioning tasks are carried out with Nokia Hopper Manager .For information on using the manager, see its Online Help. Help can be accessedby clicking Help→ Hopper Manager Help Topics on the menu.

6.1 Task list

Thefollowingorder is recommended for the commissioning of a network elementwith FIU 19E indoor unit:

1. Switch the power on.2. Connect the LMP cable between the PC and the indoor unit. Start Nokia

Hopper Manager.

3. Connect to the network element by clicking Manage→Connect Locally.Once connected, run the commissioning wizard by clicking Manage→Commission.

4. Fill in the basic settings in the wizard.

• Give the site information (optional).

• Select station type and operating mode.

• Set Flexbus (outdoor unit) capacities.• Set Q1 and LMP port baud rates and addresses, if Q1 is used for

DCN.

• Select the Q1 bus routing, if Q1 is used for DCN.

• Nokia FlexiHopper OU: Set the transmit frequency and maximumtransmit power and switch on the Tx power.

• Nokia MetroHopper OU: Give master/slave settings, temporary hopID, and channel selection method (manual/autosearch).

• Set installation information (optional) and the node clock.

5. Fine-align the antenna. When antennas at both ends of the hop have beenaligned, verify that the Rx-input level determined by the transmission

planning is met.

6. Make the cross-connections with the manager.

7. Make any additional settings:

• ALCQ

• Identification data

• Node IP address.

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8. Reset the statistics and the error counters.

9. Monitor the hop for half an hour (or longer, if necessary).

10. If the signal quality is OK (unavailability time = 0) and there are nounexpected alarms, the commissioning is finished. At this point:

• Save a copy of the node to a file.

• Backup the IU and OU configurations.

• Run the commissioning Report from the manager.

• Export the alarm log to a file.

• Export the measurements log to a file.

• Export the statistics to a file.

• Close the connection to the node.

If there is any unavailability time during the monitoring, fix the possible problem

and repeat the monitoring.

6.2 LED indicators

Table 10. FIU 19E main LED in 1+0 mode

LED Situation

RED One or more data lines are not operating correctly. The fault can be

in indoor unit itself and/or in one or more outdoor units. The fault can

also be in far-end unit(s).

YELLOW The indoor unit and/or one or more outdoor units have active

alarm(s). The data is transmitted in this configuration, but may not be

transmitted in other configurations or if another failure occurs. The

overall performance capability is reduced. Active alarm(s) can also

be in far-end units.

GREEN Both terminals over this hop are operating normally and no alarms

are active. A blinking green LED indicates that there is a connection

to the node manager.

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6.2 LED indicators

Table 11. FIU 19E main LED in 1+1 protected mode

IU1 LED(Active)

IU2 LED(Passive)

Situation

RED RED Data has not been transferred. Both protected

paths are faulty.

IU1 RED LED indicates that the data has not been

transferred.

IU2 indicates that one or more units, including far-

end unit(s), have critical alarm(s) active.

RED YELLOW Impossible.

RED GREEN Impossible.

YELLOW RED Data is transferred, but the protection is lost.

IU1 YELLOW LED indicates that the data is

transferred normally, but the protection is lost.

IU2 RED LED indicates that one or more units,

including far-end unit(s), have critical alarm(s)

active.

YELLOW YELLOW Impossible.

YELLOW GREEN Impossible.

GREEN RED Impossible.

GREEN YELLOW Data has been transferred.IU1 GREEN LED indicated that the data has been

transferred normally and the protection is enabled.

IU2 YELLOW LED indicated that one or more

units, including far-end unit(s), have major or minor

alarm(s) active.

GREEN GREEN All units in this NE are OK.

Table 12. Flexbus LEDs

LED Situation

No light No power feed or Tx signal (but an IU-IU connection may be active).

Blinking

GREEN

DC power feed to the outdoor unit active, Tx signal not active.

Continuous

GREEN

DC power feed to the outdoor unit and Tx signal active.

FIU19_EC34231.89--D0

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