> > Or I have to use an FXS to SIM adaptor? If yes, then
> > anyone advise a models and prices?
>
> I'll leave others to suggest models and prices, but in my experience,
> you're better with a SIP->GSM gateway and cutting out the analogue
> loop altogether. They're a bit more expensive, but it'll save you
> many hours playing with echo cancellation and gain settings on the
> FXS module.
You don't have to have analogue loop. There are a number of GSM PCI
adapters, and all of them seem to have a separate signalling channel
between the GSM device and Asterisk.
For instance, the GSM support included in bristuff (used for the
Junghanns GSM adapter) sets each GSM port as an ISDN-like device with
just one B channel but still with one D channel.
AFAIK, both the Bero.net and the VoiSmart GSM devices are likewise
digital.
--
Tzafrir Cohen
icq#16849755 jabber:tzafrir.cohen@xorcom.com
+972-50-7952406 mailto:tzafrir.cohen@xorcom.com
http://www.xorcom.com
iax:guest@local.xorcom.com/tzafrir
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