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
On 22 November 2010 19:23, Mitul Limbani mitul@enterux.com wrote:
Dear Raj,
For test bed we have a single port fxo card which works with Asterisk and costs Rs. 3500/- + 5% Tax
Infact I found V-Serve Technologies selling some good cards and asterisk IP PBXs as well. I guess they can be reached at vservetech.in, vserve.in
They have a range of 1-8 port IP PBX and IP Phones and Telephony Line Cards that support open-source hardware and software. Typically based on the IP-04 of astfin fame.
-Akshay
On Monday 22 Nov 2010, Mitul Limbani wrote:
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.
Agreed, it would be time-consuming, but it still sounds like a good summer hacking project to me, and if it makes Asterisk more versatile so much the better, no? I mean, how many PBX manufacturers can claim compatibility with the array of devices Asterisk works with, and the more devices it does work with the higher its acceptability.
Not that modems are that much cheaper, but you can still get a decent external voice modem for around Rs 2000, and all it needs is a serial port. Makes sense in a price-sensitive market like India to me.
Regards,
-- Raj
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.
I would be happy to contribute with bag full of tricks for voice modem.
Warm Regards,
Mukund Deshmukh, Beta Computronics Pvt Ltd, 10/1 IT Park, Parsodi, Nagpur -440022, India.
On Tuesday 23 Nov 2010, Mukund Deshmukh wrote:
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.
I would be happy to contribute with bag full of tricks for voice modem.
Offer appreciated. I wish I had the time to work on this, but this is one of the not-so-lean periods for me work-wise, so am not offering anything above the basic idea itself.
Looking at Google, it seems that some (dated) stuff is already available:
http://www.voipuser.org/forum_topic_808.html
http://lists.digium.com/pipermail/asterisk-users/2003-April/003750.html
Regards,
-- Raj
Hello,
Quoting "Raj Mathur (??? ?????)" raju@linux-delhi.org:
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.
Agreed, it would be time-consuming, but it still sounds like a good summer hacking project to me, and if it makes Asterisk more versatile so much the better, no? I mean, how many PBX manufacturers can claim compatibility with the array of devices Asterisk works with, and the more devices it does work with the higher its acceptability.
Sure, I would like to work with local Manufacturers of Voice Modems, since the card that I recommended earlier doesnt get us the callerID from Indian PSTN line.
However, If you are interested I can ship you one of the above card if you got enough time to write the CallerID Patch for Asterisk.
You can get more info from the below URL : https://issues.asterisk.org/view.php?id=6683
Its tentatively fixed for the costlier Digium and Sangoma Full 4 Port n 2 Port Boards, but its not fixed for the Single Port board, which we sell as the Asterisk Starter Kit.
Most Asterisk Enthusiasts have purchased the above card from us without the callerID thing. I still have around 40 of them in our stock.
Not that modems are that much cheaper, but you can still get a decent external voice modem for around Rs 2000, and all it needs is a serial port. Makes sense in a price-sensitive market like India to me.
So considering the Voice Modem, work, the above work (Getting Caller ID on our Single Port FXO Low cost hardware) is fairly more easier.
Due to the above problem, we stopped manufacturing them, but if the same is fixed, I am sure we can beat the Rs. 2000/- mark easily :)
Let me know, Regards, Mitul Limbani, Chief Asterisk Trainer & Founder, Enterux Solutions, www.enterux.com +91-9820332422
On Tuesday 23 November 2010 14:21:00 Mitul Limbani wrote:
I could resurrect my old (1993) Rockwell R9624vDP data voice modems. This one will i/o adpcm encoded data on it's bus and will i/o that on the phone network side. There is a daa circuit too. Which can be replaced with readymade daa.
Any newer modem should be able to do exactly the same. I have used a dlink 56k modem for some such thing in 2002.
On Tuesday 23 November 2010 10:16 AM, Raj Mathur (राज माथुर) wrote:
Not that modems are that much cheaper, but you can still get a decent external voice modem for around Rs 2000, and all it needs is a serial port. Makes sense in a price-sensitive market like India to me.
With telephone calls getting cheaper every day, does it make a significant difference when using IP telephony? Recently MTNL made calls to the US @ Rs.1 per min. Otherwise, how about those IP phones that directly use LAN ports? I think skype has this phone.
Regards,
Rony.
-
Akshay Mishra -
jtd -
Mitul Limbani -
Mukund Deshmukh -
Raj Mathur (राज माथुर) -
Rony