DS1 card connection problem !!!

[brar]

my ds1 card is setup for incoming calls with wink/wink.when the link is not up all the ports behave just fine i.e all the ports are inactive.
but the moment my ds1 gets connected from another cisco switch through MUX(RAD),for a moment the couple of ports on ds1 card becomes active randomly,then suuddenly the ds1 card goes out of service and there are no calls through and more on the calling party on the switch hears some weird sounds.
kindly if anybody can help me out of this fix.

 

[telcoguy]

Sounds familiar,
I had that happen to me with a set of RAD muxes,
what it does is, for some reason it mixes up the time slots when you got an incorrect clock signal at some point in time.
Although we never fixed it completely,we got it under control by having the provider take the clock off the line and let one of the muxes produce it itselves..
In the end we just ditched them, and now use G.703 1:1 between the routers and a VOIP trunk over it....


Hope this helps..

Rob

 

[brar]

thanx telco for a response but can you please elaborate what exactly should be done and where???/

 

[telcoguy]

OK,
I have to do this from memory,as we don't have the equipment anymore, but in the settings there should be an assignment of the channels, and modules.
you'd probably find that the channels will shift in relation to your time slots.
There is also a setting for the clock source,
the clock source can be set to work on what you provider offers you or on the clock signal the mux can generate.
What we did at the time it set the master-mux up to be the clock generator, and asked the provider to remove clock.
The weird sound you hear is probably data streams ending up in your voice streams.
If you don't want to do these changes, remove the boards/ports from the config and add them back in , and you'll find that it all works again for a while until the next clock mismatch..
Like I said we never fixed it completely either , just got it turned into a workable situation.