[Asterisk-Users] Channel for virtual modem

[Steven Critchfield]

On Fri, 2003-06-27 at 20:00, Ernani Jose Camargo Azevedo wrote:
> Hi All,
> 
> I'm wondering if exists something like a channel that could be used in
> Asterisk to act as a Modem?

Not yet. I have been thinking of trying to use a lin-modem dsp.a library
to hook up and use. If I am the only resource for it, it will take a
long time for it to be usable.

> The purpose is to get a remote call through SIP comming from one or
> more cellular companies going directly into a remote Asterisk PBX
> through a metropolitan fiber wan, and redirect the call to a real
> modem. But I'm thinking if it's possible to simulate a modem in a
> channel in the Asterisk PBX that connect and execute a PPP protocol.
> Is this possible to be done?


If you are using a cellphone as a modem, it requires the cell provider
to have a modem bank for you. The phone itself doesn't have a modem.
Also the throughput should only be about 9600-14400, and below the
quality for a SIP call. 

Why wouldn't you just have asterisk take the SIP call and dial out to
the cell phone as a standard phone call? 

-- 
Steven Critchfield <critch at basesys.com>