#osn2500

Before using this manual, the commissioning personnel must receive trainings on the optical network equipment. They also should be skilled in using the commissioning tools. The commissioning personnel must attain familiarity with the following items:

Knowledge on SDH (Synchronous Digital Hierarchy), PDH (Plesiochronous Digital Hierarchy, and Ethernet

Knowledge of OptiX OSN 2500

How to use the T2000 to configure services

How to use the T2000-LCT to configure services

How to use the commissioning meters (SDH, PDH, Ethernet)

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Safety Precautions when Commissioning the OptiX OSN 2500

iManager U2000 Single-Server System Software Installation Guide

Check Before Commissioning

Before commissioning the OptiX OSN 2500, it is required to check the listed items.

Checking Installation of NMS

Check the following items as to the NMS:

The T2000 must have been installed in the central equipment room. The installation must have been checked.

The T2000-LCT must have been installed in the laptop computer. The installation must have been checked.

Refer to the OptiX iManager T2000 Installation Guide and OptiX iManager T2000-LCT User Guide.

Checking Hardware Installation

Check the connection of the interfaces of the SEI board.

Regarding the OptiX OSN 2500 , the front panel of the SEI board has multiple RJ-45 interfaces, which are defined to access different signals. Take great care and avoid incorrect installation to protect the internal chip from being damaged. For details, refer to the OptiX OSN 2500 Intelligent Optical Transmission System Hardware Description. Figure 1 shows the positions of the interfaces of the SEI board.

CAUTION:On the SEI board, LAMP1 is the egress port, and LAMP2 is the ingress concatenated port for the alarm indicators on the cabinet.

Figure 1 Front panel of the SEI board

Checking Grounding

Check if the equipment is grounded.

Check if the grounding is proper.

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To clear bit errors that occur due to loose connection of the PGND cable, reconnect the PGND cable.

Product

OptiX OSN 2500

OptiX OSN 3500 

Fault Type

Bit errors

Symptom

In the transmission network, five sites form an MSTP ring. The five sites are names as Site 1, Site 2, Site 3, Site 4, and Site 5 in the counter-clockwise direction. Site 1 is the gateway NE. Only 2 Mbit/s services are activated between Site 1 and other sites. The clock source of Site 1 is the external clock source, and the other sites trace the west line clock source. Query the alarms and performance events. It is found that a large number of bit errors exist in the lower order path at Site 1, Site 2, and Site 3. At the same time, bit errors also exist in the lower order path at Site 4 and Site 5.

Cause Analysis

If bit errors exist in the lower order path at each site, the possible causes are as follows:

Site 1 has services with all the other sites. Hence, the fault may exist at Site 1. There is little probability that all the PQ1 boards at Site 1 are faulty. Then, it is suspected that the line board SL16 is faulty.

The fan may be faulty. In this case, bit errors occur in the higher order path, which results in bit errors in the lower order path.

The 2M cables and fibers may be faulty or the cable connection may be faulty at Site 1.

Procedure

Query the history performance data. Reset the performance, then query the current performance. It is found that bit errors persist.

Check the line boards at each site. It is found that there is no bit error in the higher order path.

Check the fan. It is found that there are no anomalies but bit errors persist.

Check the equipment environment. It is found that the PGND cable is improperly connected. Fasten the PGND cable, then query the performance. It is found that bit errors are cleared.

Reference Information

The EXT ports on the AUX boards of two sets of the OptiX OSN 3500 are incorrectly connected. As a result, boards fail to be added. To solve this problem, remove the cable that incorrectly connects the EXT ports.

Product

OptiX OSN 3500, OSN2500

Fault Type

DCN Fault

BD_STATUS

Symptom

One SEP1 board on the OptiX OSN 3500 reports the BD_STATUS in an interrupted manner. Erase the data on the SCC board, reset the SCC board. It is found that all boards fail to be added. After the boards are added through other methods, the BD_STATUS alarm on the original SEP1 board persists. The board type of the original SEP1 switches between the PQ1 and the SEP1. The board type of the original EU08 board in slot 19 switches between the EU08 and the D12S. In addition, the idle slot 20 is incorrectly shown to house the D12S board.

Cause Analysis

The data configuration on the SCC board may be incorrect or the inter-board communication may be faulty.

Procedure

Erase the database and then reset the SCC board. It is found that no reset record exists and that all boards fail to be added.

Erase the database on the SCC board again. Then, reset the SCC board on site, and add boards again. It is found that the SCC board can be added but the other boards fail to be added.

After all the boards are successfully added, the original SEP1 board still reports the BD_STATUS alarm in an interrupted manner. The board type of the original SEP1 switches between the PQ1 and the SEP1. The board type of the original EU08 board in slot 19 switches between the EU08 and the D12S. In addition, the idle slot 20 is incorrectly shown to house the D12S board.

Exchange the SCC board with the SCC in the corresponding extended subrack (OptiX OSN 3500). Then, repeat Steps 1, 2, and 3, and then find that the problem persists.

Check the cables on site. It is found that a cable is used to connect the EXT ports on the two sets of OptiX OSN 3500. Remove the cable and then find that the problem is solved.

Reference Information

The EXT ports of the main subrack and the extended subrack can be connected only when the UXCSA board is configured to connect to the extended subrack. In this case, the alarms and configuration information of the extended subrack are transmitted to the SCC board in the main subrack through the EXT ports. The extended subrack need not be configured with the SCC board and the XCE board.

CAC check errors are displayed when you create a link. Hence, you need to delete the useless connections on the port.

Product

OptiX OSN 1500A/1500B

OptiX OSN 2500

OptiX OSN 3500 II

OptiX OSN 3500

OptiX OSN 7500

Fault Type

Configuration_Problem

Symptom

When you create a connection, a CAC check error is displayed. A connection fails to be created.

Cause Analysis

The boards support the CAC check function. If a link needs to be created, and if the sum of selected traffic rate and the traffic rate of all the existing links at the port exceeds the total bandwidth of the port, a CAC check error is displayed. Consequently, the link fails to be created.

Procedure

Make sure that the selected traffic rate is less than the remaining bandwidth of the port when you create a link. Delete the links that are not required at the port, and then create new links again.

Reference Information

After two connections are created, they cannot be added into a protection group. Hence, you need to configure the sink-source relation of the protection group.

Product

OptiX OSN 1500A/1500B

OptiX OSN 2500

OptiX OSN 3500 II

OptiX OSN 3500

OptiX OSN 7500

Fault Type

Equipment_Interconnection_Fault

Symptom

After creating two connections, you fail to add them into the protection group.

Cause Analysis

For 1+1 protection type:

For 1:1 protection, the working and protection links must have different sinks and different sources.

In the case of source protection, the working and protection links must have the same sink but different sources.

In the case of sink protection, the working and protection links must have the same source but different sinks.

In the case of source + sink protection, the working and protection links must have different sinks and different sources.

Procedure

Determine the relation between the source and sink of the protection group. After changing the connections, add them into the protection group again.

Reference Information

If the LPT bearer modes of the ports at both ends are inconsistent, LPT switching may fail. Hence, ensure that the LPT bearer modes of the ports at both ends are consistent.

Product

OptiX OSN 1500A/1500B

OptiX OSN 2500

OptiX OSN 3500

OptiX OSN 7500

Fault Type

LPT

Fault in the Ethernet

Symptom

In the case of R006 or earlier versions, LPT fails to work normally when the EFS board interconnects with the EMS4 board. After the service at the SDH layer is disconnected, automatic switching can be normally performed at both ends. After the network cable is removed from an Ethernet port, automatic switching at the opposite end fails.

Cause Analysis

In the case of version R006 or earlier than R006, the LPT function of the EFS board supports the MAC bearer mode only whereas the EMS4 board supports the GFP bearer mode only. Hence, the EFS and EMS4 boards fail to interconnect with each other due to different LPT bearer modes after the LPT function is enabled.

Procedure

Modify the LPT bearer modes of the ports at both ends to be the same.

Reference Information

Product

OptiX OSN 1500A/1500B

OptiX OSN 2500

OptiX OSN 3500 II

OptiX OSN 3500

OptiX OSN 7500

Fault Type

RPR

Ethernet fault

Symptom

The fibers are incorrectly connected. In this case, the RPR_NB_INCONSIS alarm is reported, which results in the RPR network interruption. Figure 1 shows incorrect fiber connections.

Figure 1

Incorrect fiber connections

Cause Analysis

The previous fault is caused due to incorrect fiber connections. In this case, ringlet0 receives packets from ringlet1 or ringlet1 receives packets from ringlet0.

As shown in Figure 1, the eastbound adjacent node of S2 is S3 but the westbound adjacent node of S3 is S1 rather than S2. Thus, the RPR_NB_INCONSIS alarm is reported.

Procedure

Query the cross-connection configuration on each board to check whether there are cross-connections that are not completely configured on a board. Configure cross-connections from the Ethernet board to the SDH line board for each NE. See Reference Information.

Check whether the fiber connections on the line board are correct. Connect fibers to make the input and output interfaces of the optical modules match. Figure 2 shows links between nodes. After fibers are connected properly, the alarm is cleared and the fault is rectified.Figure 2 Correct fiber connections

Reference InformationThe steps of configuring Cross-Connections:

In the Main View, select the desired NE. Right-click the NE and choose NE Explorer from the shortcut menu.

Choose Configuration > SDH Service Configuration from the Function Tree.

Click Create in the lower right of the window. The Create SDH Service dialog box is then displayed.

Set the parameters in the dialog box as follows:

Based on the operations in Step 4, set the parameters in the dialog box as follows:

Level: VC-4

Direction: Bidirectional

Source Slot: 13-N2EGR2-1

Click . In the Please select the source timeslot dialog box, set the following parameters.

Sink Slot: 12-N2SL16-1(SDH-1)

Sink Timeslot Range: 1-8

Activate Immediately: Yes

Then, click Apply.

Port: 1

Higher Order Timeslot: 1,3,5,7,9,11,13,15

Level: VC-4

Direction: Bidirectional

Source Slot: 13-N2EGR2-1

Click . In the Please select the source timeslot dialog box, set the following parameters.

Sink Slot: 7-N2SL16-1(SDH-1)

Sink Timeslot Range: 1-8

Activate Immediately: Yes

Then, click Apply.

Port: 1