[Asterisk-Users] GSM connection for asterisk

[Alfred R. Nurnberger]

Terje
you have 2 issues here to deal with:

	-1 the hardware to connect the M-20 to *
	- 2 a channel driver controling the M-20

ad 1) The M20 is controlled via a async. data port (like rs232)
	For a single channel solution you could connect it to a level converter
(MAX232)
	and hook it up to your COM port.
	For a single channel solution you can connect the analog audio in/out of
the M20 	to your soundcard ports.

ad 2) The audio part with OSS and dev/dsp is pretty much taken care of.
	To control the M20 you need a channel driver which spits out AT modem
command 	sequences based on API messages and reacts to the M20s status and
reports it back 	to the API

	ie. DIAL (Gsm/1/5551212) converts to  ATD5551212;<cr> on COM-1

This would be a low cost single channel solution. For more channels or out
of the box
solutions I would recommend either a fixed cellular terminal or a GSM
multichannel gateway with T1 or E1 port. (well this is my field of work)

Regards
Alfred


-----Original Message-----
From: asterisk-users-admin at lists.digium.com
[mailto:asterisk-users-admin at lists.digium.com]On Behalf Of Terje
Christensen
Sent: Thursday, January 15, 2004 12:49 AM
To: asterisk-users at lists.digium.com
Subject: [Asterisk-Users] GSM connection for asterisk


Hi
Has anyone managed to connect a GSM modem to Asterisk ?
I have a Siemens M20 Terminal that can do voice/fax/data and want to connect
it. Are there someone on the list that has experience with the Siemens M20
and Asterisk?




Terje

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