[Asterisk-Users] FAX and Data support in asterisk......?

[denzel at infotechs.lk]

greetings!

 We are planning to deploy Asterisk PABXs between several offices. The
connection between the offices are going to be on IAX channels. Currently we
use G.729 for the IAX channel. But for sending FAXes between offices over
IP, this method is not gonna be satisfactory since with this codec there is
a data loss. Is there any other lossless codec that we could use to send FAX
over IP ? Ideally we would like to have G.729 reserverd for voice calls and
a "lossless codec" for FAX service. Can anybody suggest a way to do this ?





----- Original Message -----
From: "Steven Critchfield" <critch at basesys.com>
To: <asterisk-users at lists.digium.com>
Sent: Tuesday, May 27, 2003 6:54 PM
Subject: Re: [Asterisk-Users] FAX and Data support in asterisk......?


> On Tue, 2003-05-27 at 07:10, denzel at infotechs.lk wrote:
> > Hi All,
> >
> > What the support that asterisk has to send/receive Faxes? Can I plug a
FAX
> > machine in the a FXS extension and send out Faxes? What's the codec I
need
> > to use? g.711? Also can we receive a FAX into a FXS extension in
Asterisk
> > PBX?
> >
> > Also I need to know if we can send/receive FSK data from/to an extension
> > plugged into Asterisk PBX? For example if there's a phone model which
can
> > send text/images to another phone of the same kind, can they sit on FXS
> > extension of Asterisk and do the same thing? If yes, what's the codec
that
> > needs to use?
> >
> > Also can we set it up to support one codec for Voice and another codec
for
> > Data?
>
> If you are using non VoIP connections between telephony hardware, you
> don't have to worry about codecs. Codec choice only comes into play if
> you are doing some VoIP connections where bandwidth is of concern.
>
> As far as phone connections and fax connections, again if you are using
> hardware from Digium, you just plug them in just  like any other phone
> and they just work. You only run into trouble if you are doing VoIP over
> much of a distance. While I have had some luck getting a 14.4 connection
> over my cable modem using Zap hardware, it isn't a good idea to do it
> for important calls.
>
> --
> Steven Critchfield <critch at basesys.com>
>
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