On Tue, 23 Jun 2009, Sasa Bobek wrote:
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 :)
They're designed for remote areas - they are wall mountable and have an
external antenna socket and an (rj11) phone socket on the side... Plug in
an analogue phone and off you go.
The ones I've used & have also have internal rechargable batteries - which
take-over when the mains fails - I imagine they'd be cheaper without all
that additional hardware though.
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.
Right - best stick with that then!
Gordon
Sasa
On Tue, Jun 23, 2009 at 1:17 PM, Gordon Henderson <
[email protected] <gordon%[email protected]>> wrote:
On Tue, 23 Jun 2009, Sasa Bobek wrote:
The price difference is HUGE. Analog i about 66% cheaper.
But you then need some sort of analogue adapter/interface to feed the
analogue GSM module...
Although if you've already got this, it's a obviously a cheaper option.
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..
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.
Gordon
On Tue, Jun 23, 2009 at 12:44 PM, Gordon Henderson <
[email protected] <gordon%[email protected]> <
gordon%[email protected] <gordon%[email protected]>>> wrote:
On Tue, 23 Jun 2009, Sasa Bobek wrote:
Hi all,
We have been planing for a long time to set up GSM mobile trunks for
termination, and were planing on going with analog GSM adapters
connected
to
a VoIP gateway. Should we be concerned with such a set-up as far as
voice
quality and other issues are concerned? Any experiences with GSM
terminal
chipsets?
Why not SIP based GSM devices? e.g. Portech?
Gordon
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