The OSN3500 business phone primarily uses the E1/E2 bytes in the segment overhead for voice and signaling. During the opening test phase, the business phone is usually used for inter-site communication between sites. In areas with harsh communication conditions, business phones become an important means of inter-site communication. Using E1/E2 bytes in the segment overhead for communication, it does not need to occupy the service bandwidth. Configuration is relatively simple, and it is very easy to set up the official telephone. Business telephones can be used in areas with harsh communication conditions.

Problem Description

1, A and E open official telephones, 1 for OSN 3500, 2 for Huawei OTN, 3 for OSN 3500, 4 for Friendship SDH equipment, and 5 for OSN 3500, for networking.

2. After the service configuration is completed, it is found that the official telephone is not available, and there is no alarm on the network management.

3、When the length of the official telephone number is reset, the official addressable call telephone number will be modified to the default telephone number corresponding to the length.

Processing

1. First check the official telephone configuration and confirm that there is no problem.

2、According to the business direction, check the existing network, there is no line failure or interruption.

4、Troubleshoot the phone or phone line, after checking that there is no problem

3, 1 and 3 to open the official telephone test, can be used normally, to rule out 1, 2, 3 problems

4、Customer feedback, 5 equipment has no other business, you can jump off the 3 equipment through the fiber. After jumping off the friendly equipment, 1 and 4 open the official telephone service, can be used normally. Users are asked to check the problem of the friendly equipment. After checking, the friendly equipment only carries out cross-connection and does not transmit E1/E2 bytes, which leads to inaccessibility, and it is restored by the engineers of the friendly equipment after processing.

Reason forfailure

After analyzing the problem, it is found that the docking friend's equipment does not set up E1/E2 byte pass-through.

Solution

OSN 3500 does not need to be processed, and the friend dealt with it ( E1/E2 byte transmission).

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