[asterisk-users] Xorcom Astribank

[Tzafrir Cohen]

On Mon, Sep 18, 2006 at 09:15:11AM +0200, Klaus Darilion wrote:
> Hi!
> 
> Does some one of you have practical experience with the Astribank 
> channel bank 

I'm well familiar with it, sure. ;-)

> (I've tried to contact xorcom directly but didn't received 
> any answer)? 

It seems that indeed we have not recieved your mail. Anyway, you're
always more than welcome to contact info at xorcom.com .

> We plan to use an Asteribank-16 channel bank to connect 
> analog fax devices to Asterisk (to get rid of buggy Fax over G.711 with 
> SIP terminal adapters)
> 
> Does Astribank support fax devices (as fax is sensitive against jitter, 
> delay, synch ...)?

Yes.

> 
> Are there special configuration issues when dealing with fax devices?

First off, be sure to disable echo cancelling. (echocancel=no for the
channel of the fax in zapata.conf).

That depends on where the fax is coming from (or going to).

If it is coming from an FXO extension on a Astribank FXS/FXO device, you
have no problems.


If it's from a different zaptel device: there may be some sync problems.
For a normal call those may be clicks. For a fax those will basically
terminate the fax. I'm working on a patch to Zaptel and to our driver to
solve this.


If it is from a SIP/IAX peer, then basically see
http://www.voip-info.org/wiki/view/FoIP and the many messages on this 
list about this subject.

-- 
Tzafrir Cohen         sip:tzafrir at local.xorcom.com
icq#16849755          iax:tzafrir at local.xorcom.com
+972-50-7952406          jabber:tzafrir at jabber.org
tzafrir.cohen at xorcom.com     http://www.xorcom.com