Weird sound when receiving a call through one PSTN

OrlandoP

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#1
I have an Elastix system with 4 FXO. When I receive a call to the number on the 3rd FXO port I get a weird sound for 10 seconds as soon as you pick it up, and the it goes off and you can talk perfectly. After about 60 seconds it goes on for a couple of seconds and off again. It sounds like the sound modems made when you connected to the internet over dialup.

I have tried using fxotune -i 5, and fxotune -s, and the problem remains.

Here is a link to a recording I made of it:
http://www.ziddu.com/download/6777008/g ... 3.mp3.html

Thanks in advance!
 

torboy

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#2
it sounds like a fax machine. is your inbound call going through a fax route
 

OrlandoP

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#3
I just checked everywhere and it is not set as a fax.
I deleted that trunk, changed the line to port 4 on the OpenVox A400 card, and it continues with the same sound.
I configured the outbound route, so the system dials with that line, and even with outgoing calls I get the sound for about 10 seconds.

Any other sugestions on what else can I check?
 

torboy

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#4
did you try to connect a phone set to your pstn line directly, maybe it is the provider or you have other equipments on the line. like alarm systems connected to your telephone line
 

OrlandoP

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#5
No, the line is fine. Actually, right now I have a phone connected directly to the Wall, since that number is really important for our business, so for sure, it is something in the Elastix system.

I was checking and my system is only using 2.4% of CPU and 6.7 % of memory. So it has to be some configuration. The weird thing is that it is a new system, I have only configured extensions, inbound routes and outbound routes, nothing else. The only file that I have edited via the command line is the dahdi-channels.conf where I changed the line "context=from-pstn" to "context=from-zaptel" so the inbound routes could work.

Thanks for the suggestions so far. Anything else you think can be causing this?
 

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