Dear Raj,
For test bed we have a single port fxo card which works with Asterisk and costs Rs. 3500/- + 5% Tax
But this card is not recommended in production environments, this is what we stock and suggest for all the new guys who want to have a phone line come into asterisk and do their research projects (several of these cards have been sold in IITs all over india)
Btw writing a voice modem driver would be time consuming n costly affair n still requires a lot of testing, I believe the option I have makes economic sense.
Anyone wants to purchase on can get in touch with me offline.
Regards, Mitul Limbani Enterux Solutions www.enterux.com +919820332422
"Raj Mathur (राज माथुर)" raju@linux-delhi.org wrote:
On Monday 22 Nov 2010, Mukund Deshmukh wrote:
Most modern modems (by "modern" I mean compared to the 2400bps Microteks we used to use back in the early 1990s) have audio handling through AT commands. Hypothetically it should be possible to write a program that captures audio from the modem, transcodes it and plays it through ALSA, as well as the reverse: capture ALSA audio, transcode it and play it back to the remote party through the modem.
Check this... http://search.cpan.org/~mukund/Ivrs-0.24/Ivrs.pm No further development, as these modems have almost vanished.
Very neat! You know what would be even neater? Make an Asterisk driver for voice modems. Then you can use all Asterisk features without having to buy PSTN cards, useful for test beds and low-budget installations.
Regards,
-- Raj
Raj Mathur raju@kandalaya.org http://kandalaya.org/ GPG: 78D4 FC67 367F 40E2 0DD5 0FEF C968 D0EF CC68 D17F PsyTrance & Chill: http://schizoid.in/ || It is the mind that moves -- http://mm.glug-bom.org/mailman/listinfo/linuxers