[asterisk-users] Fax through Sangoma A102

[Bill Gibbs]

Incoming faxes, the Sangoma will detect the tones and disable echo cancel.
 
To send outbound, you will have to add another trunk group, of one or more channels and disable echo cancellation and use that to dial out.
 
Example (/etc/asterisk/zapata.conf)
blah blah
echocancel=yes
blah blah 
group = 1
channel =>1-20
 
blah blah
echo cancel=no
group = 2
channel=22-23
 
So you would use for faxing specifically Zap/g2/<number> and it will use channel 22 or 23 but with echo turned off.
 
Use Zap/g1 and it will use the first group of channels with echo cancel on (or whatever other parameters come before the group command)
 
Bill
 

________________________________

From: asterisk-users-bounces at lists.digium.com on behalf of jeremij jerome
Sent: Tue 1/9/2007 10:52 AM
To: asterisk-users at lists.digium.com
Subject: [asterisk-users] Fax through Sangoma A102


Hello,
 
in our company we are trying to do this:
 
Fax <--> Traditional PBX <--> Asterisk <--> PSTN
 
In practice, we have put an Asterisk equipped with a Sangoma A102 (2 PRI ports) between our PBX (Siemens HiCom) and the PSTN in order to have a VoIP network along the traditional telephony network. 
 
The problem is with the fax. We just want to send and receive faxes from/to our fax machine connected to the Siemens (without needing any interaction with our VoIP network, the faxes are sent to/received from PSTN). Unfortunately we are experiencing a lot of problems: the faxes not always work and when they work, it's likely to have incomplete pages. 
 
I know that faxing with VoIP is very troublesome, but maybe someone else is using a similar configuration and he found a good configuration or maybe has some hints to improve the results.
 
We are using Asterisk 1.2.13.
 
Thanks,
Jeremi
 
 
 
 
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