Unstable SS7 links and G.703 balun modules...
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Posted by on May 3, 2005, 2:56 am
Please log in for more thread options Hi, We are connecting some Cisco SS7 equipment (ITP) to a GSM network using Black Box G.703 balun modules. Attached is a schematic diagram of the connections. The links work fine most of the time. But, occasionally all the E1 links on the Cisco SS7 equipment go down. We haven't yet found what causes the problem. Usually the only way for the links to come up is to reboot the equipment or sometimes to shutdown and startup the E1 controllers. As shown in the diagram, we have some connections going straight to another SS7 equipment through a couple of baluns. We suspect these connections might be causing some problem because we haven't got the grouding configuration correct for the balun's involved in these connections. Ever since we have disconnected these connections the problem seems to have vanished. Can someone see something obviously wrong in the diagram? Can someone suggest anything or has someone seen any problem like this before? Thanks, Abhik. | |||||||||||||
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Posted by John Smith on May 4, 2005, 1:07 am
Please log in for more thread options In the past i've found circuits to cisco's drop if there are a few to many errors in transmission.... just a thought (since the links come in in the first place it sounds like theyre setup ok... B | |||||||||||||
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>
> We are connecting some Cisco SS7 equipment (ITP) to a GSM network using
> Black Box G.703 balun modules. Attached is a schematic diagram of the
> connections.
>
> The links work fine most of the time. But, occasionally all the E1
> links on the Cisco SS7 equipment go down. We haven't yet found what
> causes the problem. Usually the only way for the links to come up is to
> reboot the equipment or sometimes to shutdown and startup the E1
> controllers.
>
> As shown in the diagram, we have some connections going straight to
> another SS7 equipment through a couple of baluns. We suspect these
> connections might be causing some problem because we haven't got the
> grouding configuration correct for the balun's involved in these
> connections. Ever since we have disconnected these connections the
> problem seems to have vanished.
>
> Can someone see something obviously wrong in the diagram? Can someone
> suggest anything or has someone seen any problem like this before?
>
> Thanks,
> Abhik.
>