Universal Switch Architecture for Multiservice Grooming

Huawei OptiX OSN equipment uses a universal switch architecture for unified grooming of packet services and TDM services. OptiX OSN equipment can work in packet mode, TDM mode, or dual-domain (packet+TDM) mode.

The three modes can be smoothly switched by upgrading the software of a service board so carriers' requirements on services and networks can be met. The smooth switching between the three modes supports carriers' distributed smooth investment based on the development of the technology and industrial chain.

Based on a universal switch architecture, OptiX OSN equipment OSN 3500 uses the packet transmission technology to perform efficient statistical multiplexing on data services so the transmission cost of every bit is reduced. In addition, OptiX OSN equipment uses the Native technology to transmit TDM services so voice services are transmitted with high quality.

Figure 1 OptiX OSN equipment architecture 

Based on a universal switch architecture, OptiX OSN equipment unifiedly transmits packet services such as 2G, 3G, and VIP private line services so network overlapping is avoided. In addition, OptiX OSN equipment transmits TDM services. Carriers can constitute an end-to-end packet network, dual-domain (packet+SDH) network, or STM-64 board and Hybrid (MSTP+routers) network that bears L2+L3 services. This complete packet transmission solution allows an evolution from TDM networks to all-IP networks

How to Locate fault during Huawei OptiX OSN2500?

Handling of Abnormalities of Fiber, Cable, and Connector

This section describes how to handle a fiber failure, cable failure, and a connector failure based
on the common causes of the fiber failure, cable failure, and connector failure.

Common Causes

1. Cables are broken or wrongly spliced.
2. Attenuation of cable and flange is very high.
3. The cable connector is loose.
4. Power cables are wrongly connected.
5. The interface board is wrongly connected.

Procedure

Step 1 On the U2000, check whether alarms, such as R_LOS, R_LOF, T_ALOS, P_LOS or

IN_PWR_ABN, are triggered when the fiber, cable, or connector is abnormal. When these

alarms exist, refer to Huawei OptiX OSN 2500 Intelligent Optical Transmission System Alarms

Reference to handle these alarms.

Step 2 Check whether optical fibers and power cables are broken.

Step 3 Check whether optical fibers are wrongly spliced.

Step 4 Check whether connectors are loose.

Step 5 Check whether the bending radius of the optical fiber is not less than 60 mm.

Checking Configuration Data

During the fault location and rectification, the configuration data should be checked.

Check whether the data is correctly configured. Especially, check the configuration data when

the services are interrupted during the equipment installation, commissioning and upgrade.

The query items include data configuration of the network, NE and U2000.

Checking Misoperation

Human misoperation may result in service interruption.

Misoperation

Human misoperation refers to the following operations on the available services.

Configure hardware or software loopback.

Configure services as unloaded.

Procedure

Step 1 Check whether the loopback is configured on the tributary or line. If the loopback is configured,

the LOOP_ALM alarm, indicating the loopback, can be queried on the U2000. In this case,

release the software or hardware loopback on the U2000 or equipment.

Step 2 Check whether "service unloaded" is configured on the U2000. If "service unloaded" is

configured, the alarm indicating that the path is unloaded, such as LP_UNEQ, can be queried

on the U2000. In this case, modify "service unloaded" to "service loaded".

Checking Consistency of Board Models

After the replacement, models of the new board and original board should be consistent.

Procedure

Step 1 Check whether the model of the replaced or added board during the upgrade or expansion is

consistent with that of the original board. Especially, in the case of the cross-connect and timing

boards with the active and standby relation, the active and standby boards should of the same

model. If the board models are inconsistent, the WRG_BD_TYPE alarm, indicating that the

board type of the inserted board is incorrect, can be queried on the U2000.

Step 2 According to the actual situation, check whether the setting of the DIP switch and jumper is correct.

Handling Hardware Faults of Equipment

If the fault is a hardware fault, replace the faulty board with a new one.

Common alarms indicating hardware faults are listed as follows:

HARD_BAD

COMMUN_FAIL

HSC_UNAVAIL

BD_STATUS

BUS_ERR

CHIP_FAIL

PLL_FAIL

TR_LOC

T_LOSEX

For handling of the preceding alarms, refer to the Alarms and Performance Events Reference.

Locate the faulty station by analyzing the alarms, indicators or using the loopback. Then, replace

the faulty board to rectify the fault.

Guiding you how to upgrade Huawei OptiX NG-SDH Hot Patch

Checking Board Information

When engineers need upgrade Hot Patch of Huawei OptiX NG-SDH, such as Huawei OSN3500, Huawei OSN1500, they must check all boards information.

Description

Check whether all board versions match each other and determine whether to upgrade the NE according to the board types and release documents.

Precautions

Ensure that you have obtained the version mapping table and patch notes.

Procedure

                               Step 1     Choose Administration > NE Software Management > NE Data Backup/Restoration on the main menu.

The Transport/PTN NE View tab page is displayed.

                               Step 2     Click to display the Board Information tab page and then click Query.

Information about all boards will be displayed.

                               Step 3     Check the board versions against the version mapping table. If any version discrepancy occurs, upgrade or downgrade the board to the mapping version.                          

     Step              4    Query the board manufacturing information on the NMS or by running the :cfg-get-bddetailinfo:bid command. BD-Name indicates the board type.

                               Step 5    Check whether a board needs to be upgraded according to the version mapping table and patch notes.

If an NE supports board-level hot patch upgrades, the query result helps determine which boards require board-level hot patches before an upgrade and check whether a board-level hot patch takes effect after an upgrade.

Follow-up Procedure

Upgrade the board whose version is different from that specified in the version mapping table.

Checking Whether Any Boards Are Offline or in BIOS State

Perform this task to check whether any boards are offline or in BIOS state. If any board, especially the standby HUAWEI SCC board, is offline or in BIOS state, a hot patch upgrade for the NE will fail.

Checking Whether Sufficient Space Is Available on Boards Perform

mapping tablecheck whether sufficient space is available on boards. If the boards do not have sufficient space, the upgrade will fail.