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Joined: Jul 2010
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I have discovered a problem I've never seen before.

On a 6 PIM 2000 IPS, when you use an analogue extension for a voice call (using a standard analogue phone), the call quality for the user at the analogue phone end is both exceptionally quiet (including dial tone) and also has lots of static with speech.

The caller - whether on a digital, IP or external connection doesn't hear any issue with the call - sounds fine and loud and clear.

It happens on any analogue card in any PIM. To me it almost 'feels' like a physical problem and not a programming one. I've never encountered this before (in 10 years supporting IPS).

Any ideas?

Last edited by solidpro; 12/09/12 11:19 AM.

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Sounds very strange. Any analogs stations in Pim 0? If not, move a card there & test.

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Hi

I tested on a card in PIM 0 and in PIM5 and the problem is the same.....


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was the pbx working before? or
Does this problem occur after installation?


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If you have a spare CPU, I would try one. Or it maybe a power supply.

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PBX has been fine for years. For a while we've had complaints about faxes and I had problems with dialogic but I'd never noticed a problem because in noisy server rooms you can't necessarily tell if an analogue dial tone is unusually quiet. I then needs to use some analogue extensions and thought it was the phones being rubbish. After swapping phones, extension cards, PIMs etc I noticed there was a serious problem...


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First silly question: Are you using the same analog phone each time you test? Is it a "known-good" phone?

Second silly question: Is it the same user every time?

Third silly question: Is the analog phone volume turned sharply down?

Fourth silly question: Is the MDF and are all the IDFs clean and dry (no dust, no moisture, no green 66-blocks, no metallic dust on blocks)?

Silly as they sound, a lot of problems arise from "obvious" things like those that get overlooked... Used to service an aluminum mill that had four-wire Avaya phones. All their blocks were out in the factory floor, covered in oxidized aluminum dust. And lots of the wires would snap off the moment I touched them, from corrosion...

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Other possible issues:

Power mains cord interwoven with analog phone cords / cross-connects. Got a funny story on that one...

Bad or loose amphenol connectors on cables...

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Hi

I've done all the usual stuff including moving PIMS (thus eliminating a specific PIM, FP, panel, cable or LTC cable)... I've used different devices (analogue phones) and all are bad on every card in every PIM!

It's all very dry and a good clean, A/C's comms room......

Thanks for the ideas though...


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I'm going to agree with DrPBX then. CPU, FP, or power supply are the likely culprits.

But if you changed PIMs, then power supply and FPs are unlikely...

CPU?


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