[Asterisk-Users] Modem => Serial ?

[Dan]

Hi,

Check:
http://www.smlink.com/download/Linux/slmdm-2.7.14.tar.gz
This is the modem I talk about
Smartlink SM56 USB version

This is extracted from the README file:

Features
========

Modem: V.92, V.90, V.34, V.32bis, V.23, V.22, V.21, Bell 103/212.
Flow control: V.42, MNP 2-4.
Compression: V.44, V.42bis, MNP5.
Fax: Class 1.
Voice: ADPCM voice compression, Digital Answering Machine.

Supported Hardware
==================

HAMR5600 based AMR/CNR/MDC/ACR modem cards on the following Southbridge
chips:
- Intel ICH0, ICH2
- Via 686A, 686B, 8231, 8233
- SiS 630
- ALI 1535.
SmartPCI56/561/562/563 based PCI modem cards.
SmartUSB56 based USB modem.


BR,
Dan
----- Original Message ----- 
From: "Steven Critchfield" <critch at basesys.com>
To: <asterisk-users at lists.digium.com>
Sent: Wednesday, June 04, 2003 1:55 PM
Subject: Re: [Asterisk-Users] Modem => Serial ?


> The problem with the few softmodem drivers I've dealt with is that parts
> of the driver are _NOT_ in source form. The parts that are in source
> form are basically a serial interface to the dsp library that does
> direct hardware access as it would have kernel level privs from having
> been called from inside the kernel.
>
> I'm interested in documenting a dsp library that is available for a
> software modem and seeing if it could be a resource for asterisk to
> create a modem interface. But this is a project probably for the
> fall/winter.
>
> On Wed, 2003-06-04 at 05:38, Dan wrote:
> > With a software modem, you cannot bypass AT commands and directly acces
the
> > hardware for voice applications, as you have the source code for the
modem
> > driver himself?
> >
> > BR,
> > Dan
> >
> >
> > > The problem is using the AT command set, not whether or not serial
> > > communications can carry voice. Remember that T1 is just a really fast
> > > serial line.
> > >
> > > The AT command set is a remnant of low power computing. You issue a
> > > command to get started with voice mode. Then you set it in record
mode,
> > > and look to see if there is incoming audio. Then you issue a command
to
> > > send audio when you have some in your queue.
> >
> >
> > _______________________________________________
> > Asterisk-Users mailing list
> > Asterisk-Users at lists.digium.com
> > http://lists.digium.com/mailman/listinfo/asterisk-users
> -- 
> Steven Critchfield <critch at basesys.com>
>
> _______________________________________________
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> Asterisk-Users at lists.digium.com
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>
>