T103测试线用于长途局间中继线上所有监控和信令功能测试。

The T103 is used for the overall testing of supervisory and signaling features on inter - toll trunks.

youdao

T103测试线用于长途局间中继线上所有监控和信令功能测试。

The T103 is used for the overall testing of supervisory and signaling features on inter - toll trunks.

youdao