[VoIP] Bell 103 modem emulation in Asterisk?

[Steph Kerman]

Max,

Does * support analog Caller ID demodulation?  CID demod is the same as 
the receive channel of a 202 modem (1200 BPS FSK half duplex).  If * 
handles this, revamping it to 103 frequencies ought not be too 
difficult.  The modulation side ought to be easier.

Steph

ikjtel wrote:
> In the very old days, UNIX "time sharing" systems
> would have a bank of answer modems ("data sets" ;-)
> that would be connected to the host system over serial
> ports.  A process known as "getty" would be running in
> the host that would look for incoming calls and would
> arrange to run the login and shell processes and route
> the serial line send/receive into stdin and stdout on
> behalf of the remote user.
>
> Later, when telnetd was introduced, users would
> connect to the system using TCP/IP and "telnetd"
> (later sshd) would perform a similar function to the
> getty scheme even though there was no longer a
> physical serial port involved.
>
> I'm trying to find out if there is an asterisk app
> that basically emulates a Bell 103 answer modem (in
> DSP) so that, when dialled, it answers the call with
> the traditional answer tone...  On the backend would
> be some smoke & mirrors similar to telnetd and/or sshd
> such that the caller would receive the standard Unix
> login: prompt...  At the moment it doesn't need to
> have V.92 or even Bell 202/212 codes in the DSP...
>
> I found a few matches when searching on google such as
> chan_modem, "spandsp", "t38modem", and "iaxmodem". 
> The last one seems to be the closest but the
> aforementioned appear to be for FAX use and not
> generic voiceband-data modem stuff...
>
> If anyone has any experience with this would like to
> hear from you either on or off list...
>
> Thx
>
> Max
>