[asterisk-users] Xorcom Astribank

[Tzafrir Cohen]

Hi

I just want to note some technical points here:

On Mon, Sep 18, 2006 at 12:08:20PM +0100, Nick Burch wrote:
> On Mon, 18 Sep 2006, Klaus Darilion wrote:
> >Does some one of you have practical experience with the Astribank 
> >channel bank (I've tried to contact xorcom directly but didn't received 
> >any answer)? 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)
> 
> We have two Astribank-8 units. We couldn't get our fax machine to work 
> with it (it didn't like the echo), and the echo on analogue calls can be a 
> bit bad at times (especially far end echo).

Some technical notes: the echo won't be a problem with faxes (bad echo
cancelling may be). It is a problem for voice calls, indeed, and nees
cancelling there.

With faxes the problem is syncing between different zaptel devices. That
is: a fax sent between an FXS posrt and an FXO port of a TDM400P card or
between different ports of an Astribank FXS/FXO unit will get through.
Faxes from a T1/E1 card to a fax on an analog port will have sync
problems.

> 
> Xorcom are supposed to be working on the echo issue, but the last drivers 
> they supplied us didn't fix it completely, and we haven't heard from them 
> in months about versions with better echo cancel.

Again, please separate the faxes and the echo issues. We have done some
work on the echo issue, and the result is already in our latest drivers.
If you have any echo issues, please let us know so we could resove them.

As for the issue of the fax: I'll keep you posted when we have something
working. 

-- 
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