[asterisk-users] FAX over T1 Question

[Eric "ManxPower" Wieling]

The thing is, you are doing FAX over PRI, not FAX over T-1 (which to me 
implies Channelized T-1). Seems like most people gave you advice that 
might apply to a Channelized T-1, but would not apply or be practical 
for a PRI.

Amaru Netapshaak wrote:
> Bob,
> 
> I should have added that I have disabled hardware EC on the T1 ports.
> 
> Here is a sample of my zapata.conf -- channels 1-23 are my incoming PRI.
> This PRI handles both Voice AND FAX calls.  Having the hardware EC
> disabled makes for poor voice communications, and im looking for a way to
> enable/disable EC per the call type.   I understand that "echoncancelwhenbridged"
> and Zapata should be telling my A104d to enable/disable HWEC automatically.
> 
> Channel 25 is the first FXS port on my Rhino CB.  It has a FAX directly
> attached to it.
> 
> [channels]
> language                =  en
> switchtype              =  national
> signalling              =  pri_cpe
> pridialplan             =  national
> prilocaldialplan        =  national
> faxdetect               =  both
> echotraining            =  no
> echocancel              =  256
> echocancelwhenbridged   =  no
> relaxdtmf               =  yes
> overlapdial             =  no
> usecallingpres          =  yes
> amaflags                =  default
> context                 =  default
> group                   =  1
> channel                 => 1-23
> 
> signalling              = fxo_ls
> faxdetect               = both
> echotraining            = no
> echocancel              = no
> echocancelwhenbridged   = no
> relaxdtmf               = yes
> context                 = default
> callerid                = "FAX" <1112222>
> channel                 => 25
> 
> Thanks for your assistance everyone! 
> 
> 
> 
> --- On Fri, 9/5/08, Bob Pierce <pierceb at westmancom.com> wrote:
> From: Bob Pierce <pierceb at westmancom.com>
> Subject: Re: [asterisk-users] FAX over T1 Question
> To: "Asterisk Users Mailing List - Non-Commercial Discussion" <asterisk-users at lists.digium.com>
> Date: Friday, September 5, 2008, 4:43 PM
> 
> On Fri, 2008-09-05 at 09:19 -0700, Amaru Netapshaak wrote:
>> I have a Sangoma A104d T1 card, a Rhino 24-port FXS box, and am
>> running 
>> Asterisk 1.4.21.2
> 
> I think you're mostly right on this setup, but I wonder if your A104d is
> doing some hardware echo cancellation on these calls. If I'm not
> mistaken, that can mess up fax machine communications.
> 
> Bob
> 
> 
> 
>       
> 
> 
> ------------------------------------------------------------------------
> 
> _______________________________________________
> -- Bandwidth and Colocation Provided by http://www.api-digital.com --
> 
> AstriCon 2008 - September 22 - 25 Phoenix, Arizona
> Register Now: http://www.astricon.net
> 
> asterisk-users mailing list
> To UNSUBSCRIBE or update options visit:
>    http://lists.digium.com/mailman/listinfo/asterisk-users
> 

-- 
Consulting for Asterisk, Polycom, Sangoma, Digium, Cisco, LAN, WAN, QoS, 
T-1, PRI, Frame Relay, Linux, and network design.  Based near 
Birmingham, AL.  Now accepting clients worldwide.