[Asterisk-Users] Re: FCT-11M

[Bill Michaelson]

Thank you.  After some reboots and repeated testing, I've refined my 
observations.  The no-audio problem is gone (no explanation).  Through 
further experimentation I've been able to observe a few consistent 
things about behavior in its current condition...

The main problem seems to be related to disconnect signalling.  Simply 
put, the channel didn't hang up after the GSM connection ends.  Instead, 
I would hear a dial tone thru the bridged side of the call (it's not a 
North American dialtone).  I considered changing the zone in 
indications.conf, but that is system-wide, and probably inappropriate 
because I have a Verizon POTS line too.  Then I tried putting 
hanguponpolarityswitch=yes in zapata.conf and it worked - the call would 
be torn down.  But...

...that introduced a new problem on outbound calling, because the 
channel would hangup immediately upon remote answer.  So I added 
answeronpolarityswitch=yes too, but it had no effect.  I also messed 
around with polarityonanswerdelay= but I was operating in the dark and 
it didn't help.

So I tried to load modules with debug options (zaptel, wctdm, wcfxo), 
hoping to see more info about device behavior in realtime, but I see 
nothing new in the message log.  But I'm kind of bumbling and stumbling 
on that.  If anyone can offer more precise guidance, I'd be grateful.

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Date: Mon, 24 Oct 2005 22:24:21 -0700 From: "OTR Comm" 
<otrcomm at isp-systems.net> Subject: Re: [Asterisk-Users] GSM gateway for 
Asterisk To: "Asterisk Users Mailing List - Non-Commercial Discussion" 
<asterisk-users at lists.digium.com> Message-ID: 
<003001c5d924$5aefeb50$fe01a8c0 at sirak> Content-Type: text/plain; 
charset="iso-8859-1" I forwarded your note below to 
sales at skymicrowave.com. I found some docas on the FCT-11M at their site, 
but it was in Chinese, so I sent them your problem. Hope they will 
respond to this list and maybe to you directly. Murrah Boswel ----- 
Original Message ----- From: "Bill Michaelson" <bill at cosi.com> To: 
<asterisk-users at lists.digium.com> Sent: Monday, October 24, 2005 9:42 PM 
Subject: [Asterisk-Users] GSM gateway for Asterisk

>> I recently obtained a FCT-11M GSM-analog converter box.  It arrived with
>> no documentation.  So I popped in a SIM chip, and connected the the RJ11
>> port to an FXO port on my Asterisk box.  It worked smoothly right away
>> for inbound and outbound calls in all respects.  For about an hour.
>> Then either spontaneously or due to some action I've been unable to
>> identify, call supervision and other functions became flaky.
>>
>> 
>