[asterisk-users] Zap channel faxing in or out fails but phone calls work.

[Jerry Jones]

Just a couple checks...

You are using G711u for the FXS - right?

Also if possible turn off ECM on the FAX machines

Otherwise I have never used Sangoma cars but this configuration works  
very well with Digium cards, at least with asterisk, I do not use aah


On Jul 19, 2006, at 11:11 AM, Bruce Reeves wrote:

> I had similar problems with a Sangoma card in this configuration. I  
> recently recieved from Sangoma an updated driver that fixed issues  
> with resyncing the clock on the card. You might try getting a hold  
> of Sangoma, David Yat Sin if possible and ask him about it, it may  
> very well be the same problew.
>
> On 7/19/06, Gregory L Miller-Kramer <millerg at contexttech.com> wrote:
> I have AAH2.8 on a dual Xeon system with a Sangoma A104 and an  
> Adtran Channel Bank.
>
> The system has a single PRI connected to port 1 and port 2 has the  
> T1 cable connected to the Channel Bank. Both are configured  
> properly and work for the inbound/outbound calls and soft-fax  
> reception.
>
> I have fax machines connected to FXS ports on the channel bank. The  
> idea here is to allow faxing out over the PRI from these FXS ports  
> and for inbound DIDs to go to specific fax machines.
>
> I have Asterisk at Home 2.8 setup on this system and I am pretty  
> certain I have it configured correctly.
> * Each fax machine has it's own Zap extension.
> * The DID routes to the correct fax machine (zap extension).
> * I can make and receive phone calls with these fax machines.  
> Meaning, the fax machine has a phone hand set. I can call out with  
> that handset and receive calls on that handset.
>
> Here's the problem. When I try send or receive faxes it fails  
> telling me there was a com error.
>
> Any ideas?
>
> I am at a loss. I have followed the logs. The transmit and receive  
> work. Once the connection is made it fails indicating "com error".
>
> Additionally, I hear the "whistle and chirp" of fax machines  
> talking to each other. Combined with being able to make and receive  
> calls over those fax machine hand sets I don't know what the  
> problem is at this point.
>
> Please, if anyone has fax machines setup with a similar situation I  
> would appreciate knowing how you have it setup.
>
> OS - CentOS 4.3
> zaptel - 1.2.5
> libpri - 1.2.3
> asterisk - 1.2.9.1
> freepbx - 2.0.1
>
> Thank you,
> Greg
>
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> -- 
> Bruce
> Nortex Networks
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