Hello,
Sorry for top posting, my phone doesn't allow me to start writing from below.
Anyway, I think as you said, its a MoDem and they understand AT command set and send data only when they get connected on the remote end.
In your case you need some external application like Asterisk and also external hardware (which is not just a Voice Modem) which can send voice traffic using standard telephone signaling (like Ground Start or Loop Start)
Modem's cant do any of the above activity, however I have a device which can take one line input (std telephone line from mtnl) and shows that as telephone FXO line to Asterisk.
Please contact me off the list to know the pricing and working of the same,
Regards, Mitul Limbani Chief Asterisk Trainer & Founder, Enterux Solutions www.enterux.com +919820332422
"H.S.Rai" hardeep.rai@gmail.com wrote:
I wanted to dial telephone number (not using any Internet, just telephone network) and if possible attending phone through PC.
I have "conexant RD02 D400" [having only one port to connect phone cable, and not second port to connect phone instrument], which is connected to PC through USB port. I was able to use following command:
modem-cmd /dev/ttyACM0 ATDP123456
which rings bell on dialed number.
On picking remote phone, I expected that speaker and phone will be used to communicate, but that did not happened.
Is it possible to use PC's mic, speaker or head set attached to PC? If yes, which software or what setting?
-- H.S.Rai -- http://mm.glug-bom.org/mailman/listinfo/linuxers
In your case you need some external application like Asterisk and also external hardware (which is not just a Voice Modem) which can send voice traffic using standard telephone signaling (like Ground Start or Loop Start)
Modem's cant do any of the above activity, however I have a device which can take one line input (std telephone line from mtnl) and shows that as telephone FXO line to Asterisk.
Given that the same modem can be used for voice calls under Windows (E.g. with Windows phone dialer), it should be possible to do the same with Linux.
Blurrb on Windows dialer :
http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-...
External hardware (Or better modem) helps. With that, you get multiple PSTN ports and can detect reversal signal for metering or automatic dialing.
But basic voice calling should be possible with this modem itself.
-Shamit
On Monday 22 Nov 2010, Shamit Verma wrote:
But basic voice calling should be possible with this modem itself.
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.
It will require some programming, though, unless it has already been done by some kind soul on the 'net.
Regards,
-- Raj
But basic voice calling should be possible with this modem itself.
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.
Warm Regards,
Mukund Deshmukh, Beta Computronics Pvt Ltd, 10/1 IT Park, Parsodi, Nagpur -440022, India.
Meet us at - K2010, Booth No. 12C40, 27th Oct - 3rd Nov 2010, Düsseldorf, Germany.
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
2010/11/22 Raj Mathur (राज माथुर) raju@linux-delhi.org
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.pmhttp://search.cpan.org/%7Emukund/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.
Indeed. And it can be done on asterisk since it is all channel based. So, you only need to understand how asterisk APIs for channels are and this should be simple. Drop me a mail offline if you need some pointers on this.
regards, Akshay
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Akshay Mishra -
Mitul Limbani -
Mukund Deshmukh -
Raj Mathur (राज माथुर) -
Shamit Verma