[asterisk-users] FXO -> GSM Gateway Problem

Tech tech at digital-select.com
Thu Apr 19 04:10:35 CDT 2012

Hi Alec and Duncan

Thank you both for taking the time to reply.

Firstly regarding Duncan's post.
The asterisk makes a call fine when the FXO card is connected to a analogue
landline and the GSM Gateway works fine when connected to standard phone
handset. The problem only arises when I connect to GSM Gateway to the FXO
card. Within all 3 scenarios I'm using the same RJ11 to RJ11 cable.

Secondly regarding Alec's post.
I made the changes you suggested in the chan_dahdi.conf, rebooted and
tested. Unfortunately it didn't solve the issue.
Shown below is the new chan_dahdi.conf file and the Asterisk CLI for the
call using them setting.

channel => 1

Asterisk CLI
  == Using SIP RTP CoS mark 5
    -- Executing [XXXX at sipofficephone:1] Verbose("SIP/lewisphone-00000006",
"2,Call from VoIP network to XXXX") in new stack
  == Call from VoIP network to XXXX
    -- Executing [XXXX at sipofficephone:2] Dial("SIP/lewisphone-00000006",
"DAHDI/1/XXXX") in new stack
    -- Called DAHDI/1/XXXX
    -- DAHDI/1-1 answered SIP/lewisphone-00000006
    -- Hanging up on 'DAHDI/1-1'
    -- Hungup 'DAHDI/1-1'
  == Spawn extension (sipofficephone, XXXX, 2) exited non-zero on

Best Regards             

-----Original Message-----
From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Alec Davis
Sent: 19 April 2012 00:10
To: 'Asterisk Users Mailing List - Non-Commercial Discussion'
Subject: Re: [asterisk-users] FXO -> GSM Gateway Problem

>>	I have a problem where calling "out" of asterisk when the call is
answered dahdi hangs up immediately.
I'd make sure both answeronpolarityswitch and hanguponpolarityswitch are
either commented out or set to no.
from chan_dahdi.conf;
; Use a polarity reversal to mark when a outgoing call is answered by the ;
remote party.
; In some countries, a polarity reversal is used to signal the disconnect of
a ; phone line.  If the hanguponpolarityswitch option is selected, the call
will ; be considered "hung up" on a polarity reversal.

Alec Davis


I have had issues with wiring for incoming calls causing what looks like a
hangup when answered but in those cases the call stays up and asterisk
thinks its a new call. Have seen it on Avaya too

If it is wiring can you test a different incoming line?

Cheers duncan

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