is there a less expensive alternative?

[ChunPan9]

I’m developing an application to record/play phone conversations. I need 2 ports to record the sounds and one to play it back. I do not need to receive calls or to dial out. I’m simply recording phone conversations on a RJ-12 phone line. What I do need, are API to start record and playback files on specific ports.

Since I will not be using the more powerful telephony capabilities of a regular telephony card (i.e. Dialogic, Brooktrout, etc), is there a less expensive alternative?

Please send responses to: Cpan@nineoneone.com Thanks.


Chun Pan

 

[RLHarris]

I doubt it (welcome correction if I am wrong).

Your application requires a multi port card, which rules out a consumer grade voice enabled modem card, plus the capaility to play back a sound file.

There are probably used cards you can buy that would be fairly inexpensive (comapred to new at least)

Robert Harris

http://www.communicationsadvantage.com

 

[pansophic]

Your post doesn't exactly make sense to me. Why would you want to record on one and playback on the other (assuming that they are on the same line)? A good, full-duplex voice modem should be able to handle what you want with a single port per line.

If you are looking for a multiport/multiline capability, I have used the COMTROL RocketModem with limited success. You can get it in a 4 or 6 port model with drivers for Windows, Novell and Linux. It is a half-duplex voice modem and should work fine as a telephone answering device. I haven't tried it though, so I couldn't tell you for sure.

Of course it is only slightly more expensive to pick up a dialogic or brooktrout card on ebay, and the are infinitely superior for what you are attempting to do.
pansophic

 

[RLHarris]

The difficulty with using a full duplex voice modem is finding a software tool that will work with it.

In rereading the post "I do not need to receive calls or to dial out. I’m simply recording phone conversations on a RJ-12 phone line." , it sounds more like an audio application than a telephony application, almost like Dictaphone monitoring. If you patched the audio out to a decent sound card, you could use some kind of sound activation to start recording when the phone goes off hook. Robert Harris

http://www.communicationsadvantage.com

 

[pansophic]

I assumed from his post that he intended to write an application. Voice modems have a WAV device associated with them, so it should not be that difficult to create an app that plays and records audio as WAV files.
pansophic