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Have you seen the new GSM module for the TDM-400 card? It fits right in where you would normally have an FXO or FXS daughter card. Not sure about the price but it stands to be cheaper than any external device. Also allows for considerable density. Not sure about availability.<BR>
<BR>
http://www.mgraves.org/voip/2009/04/new-tdm-gsm-module-for-asterisk/<BR>
<BR>
http://www.asteriskgsmmodule.com/index.html<BR>
<BR>
Michael<BR>
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--Original Message Text---<BR>
<B>From:</B> Sasa Bobek<BR>
<B>Date:</B> Tue, 23 Jun 2009 13:57:22 +0200<BR>
<BR>
Thanks for the info Gordon. Just what I was looking for. I think I have seen one of the telecom FM units, it actually has a whole phone inside :)<BR>
In my end of the world things are quite different :) Portech costs an average of 160E per port, and the cost of the GSM adapter including the cost of the FXS/FXO port is about 50E.<BR>
<BR>
<BR>
Sasa<BR>
<BR>
On Tue, Jun 23, 2009 at 1:17 PM, Gordon Henderson <<FONT COLOR=0000ff><U>gordon+asterisk@drogon.net<FONT COLOR=000000 DEFAULT="COLOR"></U>> wrote:<BR>
On Tue, 23 Jun 2009, Sasa Bobek wrote:<BR>
<BR>
<BR>
The price difference is HUGE. Analog i about 66% cheaper.<BR>
<BR>
<BR>
<BR>
But you then need some sort of analogue adapter/interface to feed the analogue GSM module...<BR>
<BR>
Although if you've already got this, it's a obviously a cheaper option.<BR>
<BR>
However, here in the UK, the price difference isn't that bad, but it might be that the number of ports you'rea fter makes a difference - e.g. a 2-port SIP Portech units is £321, a single (analogue) port Telecom FM unit is £119. (so actually slightly cheaper for 2 ports with SIP Ethernet Interfaces here), but if you're looking at a dozen channels it might well be different..<BR>
<BR>
However - to your original question - I've used both the Portech and Telecom FM units (on a TDM 400 card) and not really been able to tell the difference. The Portech dials quicker, the Telecom FM obviously needs to get the number passed via DTMF, but since GSM is ... GSM which is pretty poor speech quality to start with, it didn't make any difference I could tell.<BR>
<FONT COLOR=888888><BR>
Gordon<BR>
<BR>
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<BR>
<BR>
On Tue, Jun 23, 2009 at 12:44 PM, Gordon Henderson <<BR>
<BR>
<FONT COLOR=0000ff><U>gordon+asterisk@drogon.net<FONT COLOR=888888></U> <<FONT COLOR=0000ff><U>gordon%2Basterisk@drogon.net<FONT COLOR=888888></U>>> wrote:<BR>
<BR>
On Tue, 23 Jun 2009, Sasa Bobek wrote:<BR>
<BR>
Hi all,<BR>
We have been planing for a long time to set up GSM mobile trunks for<BR>
termination, and were planing on going with analog GSM adapters connected<BR>
<BR>
to<BR>
a VoIP gateway. Should we be concerned with such a set-up as far as<BR>
<BR>
voice<BR>
quality and other issues are concerned? Any experiences with GSM<BR>
<BR>
terminal<BR>
chipsets?<BR>
<BR>
<BR>
Why not SIP based GSM devices? e.g. Portech?<BR>
<BR>
Gordon<BR>
<BR>
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