[Asterisk-Users] Virtual Modems Revisited

[Don Fanning]

Ah... Well I was sort of thinking more along the lines of trying to get
this to work into IAX or SIP.  But if you know for sure that the
modulation is broken... 

Just imagine... You'd be able to have a modem bank and save thousands of
dollars in leasing/purchasing a modem bank.

-----Original Message-----
From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Steve
Underwood
Sent: Wednesday, November 23, 2005 6:18 PM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [Asterisk-Users] Virtual Modems Revisited

Don Fanning wrote:

>I brought this up a while back and althought there are pieces that 
>interface * into Fax Telephony applications, there hasn't been 
>something that works with plain old analog modems.
>
>Then I found this piece of code.  From my initial tests it looks solid,

>but I have no clue in how to interface this into asterisk.  I thought I

>would put this link up for other people to comment and try.
>
>http://fabrice.bellard.free.fr/linmodem.html
>
>Out of the box it works with soundcards.  I've been battling jack and 
>alsa for a week trying to get them to play nice just to reroute the 
>audio but I'm out of time in this regard.  So I thought I would toss it

>up and see what other people can come up with.
>
>Happy Holidays!
>Don
>  
>
Linmodem doesn't work out the box with anything. linmodem was abandoned
by its author at a very early stage, before any of its component parts
really worked.

It has a number of useful bits, which might be used as the basis for a
modem. It does not have a properly working code for any of the modem
standards.

I think Fabrice got busy, and with patent issues preventing wide
deployment of a V.34 modem finished the software just seemed like a
waste of time to him. He is one of the good guys of free DSP, and has
since produced several valuable things which are complete.

Steve

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