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Analogue calls cut-off by incoming fax call.

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RichardFagan

RichardFagan

Vendor
Aug 21, 2008
5
GB
Bit of a strange one to get you all thinking. CS1K,Rls 5.0.CallPilot,CC7.
An established call on an analogue phone gets cut-off by an incoming call to a fax machine in the same room. However one side of the established call gets connected to the fax call i.e. fax tone. Analogue ports are on different FALC's on different loops, local wiring is not on adjacent pairs etc.
Also, internal modems are always not auto-answering - maybe related??
Anyone recognise this as fixed by a patch at all? ISSP shows switch last patched March 2009 but being a hospital it's difficult getting downtime for updates.
Told you it was weird.
 
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still sounds like a layer one.. tip to tip cross.. i would change pairs in the tie cable.. maybe test it with the jumpers lifted..

if that was a reocuring problem in rls 5 i would have seen it here.. another hosp with maybe 200 fax machines or more.

john poole
bellsouth business
columbia,sc
 
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That was my 1st thought too. Same on a different pair, and it's also across different fax's in 3 different areas.I'm thinking it's the fax machines right now but...
 
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From the description I am saying physical wiring has an issue somewhere. Sounds like a split tip and ring.
 
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Pull the cross connects in the switchroom. Connect a phone to each TN. Simulate the users situation. Does it happen there? If not, you have a wiring issue. Start searching for the crossed pairs. If it does, you have a switch problem. Call you local maintenance vendor. Good luck.

DocVic
Dedicated to Nortel Products till the end.
Need help?
 
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Definately not wiring. To make it easier it's not all the time so can't reproduce it.A wiring fault would be all the time and reproduceable under that same conditions. Seems that it started happening about when CC7 Express got added.Still reckon it's patch related. Will let you guys know.
 
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CC7 shouldn't play a role at all, are these calls coming in a certain way? Are they going through a call tree first?
 
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When did the problem start?
If it's new, something must have changed.
Is this possibly a trunk side issue?
You don't use 66 blocks do you? I once had to fly out to CA for a serious "switch problem" Turned out the 66 blocks were not split blocks....
 
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