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Thread: E1/T1 link test failed

  1. #1

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    Hi,
    I am getting the results below when I do a E1/T1 diagnostics.
    I need to know what causes " E1/T1 link test failed " error(in red color below) . So that I can fix it.
    I noticed this when users get a busy tone, when trying to make call through the E1.
    There was no record of active calls at the time.

    E1/T1 Tests: Checking for physical link : link: Up frame syncronization: Yes red alarm: No PMC Register dump: 0x52000000 : 81942804 0x52000008 : 00004040 0x52000030 : 19000100 0x52000040 : 21212100 Rx Buffers dump: 0x8008b900 : 9b545454 54545454 54545454 54545454 0x8008b910 : 3f545454 54545454 54545454 54545454 0x8008b920 : 5f545454 54545454 54545454 54545454 0x8008b930 : 3f545454 54545454 54545454 54545454 0x8008b940 : 1b545454 54545454 54545454 54545454 0x8008b950 : 3f545454 54545454 54545454 54545454 0x8008b960 : df545454 54545454 54545454 54545454 0x8008b970 : 3f545454 54545454 54545454 54545454 0x8008b980 : 1b545454 54545454 54545454 54545454 0x8008b990 : 3f545454 54545454 54545454 54545454 0x8008b9a0 : 5f545454 54545454 54545454 54545454 0x8008b9b0 : 3f545454 54545454 54545454 54545454 0x8008b9c0 : 1b545454 54545454 54545454 54545454 0x8008b9d0 : 3f545454 54545454 54545454 54545454 0x8008b9e0 : df545454 54545454 54545454 54545454 0x8008b9f0 : 3f545454 54545454 54545454 54545454 0x8008ba00 : 9b545454 54545454 54545454 54545454 0x8008ba10 : 3f545454 54545454 54545454 54545454 0x8008ba20 : df545454 54545454 54545454 54545454 0x8008ba30 : 3f545454 54545454 54545454 54545454 E1/T1 link test failed to pass the test: 1) the remote side should be set to Line_loopback or Payload_loopback or 2) loopback terminator should be plugged E1/T1 diagnostic loopback test OK ! Test successful.

    Thanks
    Victor


    Edited by: discount

  2. #2

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    Hello Victor,

    There are no any relations between E1/T1 diagnostic tests results and the E1/T1 call processing (busy, error,...)
    As you can see the link is up, frame synchronization is Yes and the final E1/T1 test is successful,so your E1/T1 link connection is OK. By the way according to diagnostic results E1 mode with CCS(ISDN PRI) should be configured.
    During E1/T1 link test QuadroGW send different kind of patterns for each timeslots and expect the same receive pattern.So E1/T1 link test cannot be pass for a normal link without any loop back mode or loopback terminator plugged like you have in the text marked in red.
    Regarding to busy tone problemyou may open TSS case with attached systemlogs.

    Artur

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