[Asterisk-Users] Re: Double DTMF with tdm card
Rich Adamson
radamson at routers.com
Thu Nov 3 14:17:56 MST 2005
I might be able to shed a little light on this...
Asterisk is constantly listening for dtmf tones on most channels. Its
either listening for inband or rfc-out-of-band, depending upon how the
attached device is defined and how asterisk def's for that device is
defined. For pstn interfaces, the "cards" don't listen for any dtmf, but
rather the zap sutff is listening.
If a call is generated from some external source (coming into *), the
dtmf will be inband once a channel is answered. For commercial telephone
equipment, once a channel is answered, the telephone equipment no longer
listens for dtmf (its simply passed inband). Not so with asterisk, and
this point has been argued with Mark some time ago; asterisk still
listens and trys to handle the dtmf, translating to rfc2833 as it thinks
is necessary.
So, it sounds like you have an answered T1 call where * is still trying
to handle dtmf (regenerating it), AND, the dtmf is being passsed inband
as well. If that is what you are seeing, then its the same design problem
that was argued with Mark, and he's insistent the current operation is
correct. I disagree, but I'm only one person.
------------------------
> SO is he definitively saying that the asterisk software is not involved
> here? (listening or regenerating tones)
>
> --
> --
> Steven
>
> May you have the peace and freedom that come from abandoning all hope of
> having a better past.
> --- - --- - - - - - - - -- - - - --- - ------ -
> - --- - - -- - - - -- - - -
> "Bart Fisher" <asterisk at icpage.com> wrote in message
> news:005c01c5e0a5$18c22710$f001a8c0 at bart...
> > OK, then...
> >
> > I posted on the Bugs Web Site and markster said: "This is a technical
> > support issue. Please pursue through Digium tech support
> > (support at digium.com) and contact me if you have any issues.", Hmmm...
> >
> > So I have written support - still waiting for answer - If I hear anything
> > I'll let you know....
> >
> > Bart
> >
> > ----- Original Message -----
> > From: "Walt Reed" <asterisk at linuxguy.com>
> > To: "Bart Fisher" <asterisk at icpage.com>
> > Cc: "Walt Reed" <asterisk at linuxguy.com>; "Asterisk Users Mailing List -
> > Non-Commercial Discussion" <asterisk-users at lists.digium.com>
> > Sent: Thursday, November 03, 2005 9:57 AM
> > Subject: Re: [Asterisk-Users] Double DTMF with tdm card
> >
> >
> >> Frankly, I think this may be happening to me too. It's still a "zap to
> >> zap" channel problem.
> >>
> >> On Thu, Nov 03, 2005 at 08:27:59AM -0800, Bart Fisher said:
> >>> My problem is slightly different as there is 2 T1 Ports involved - With
> >>> a
> >>> T1 test set I can clearly hear two tones sent quickly with each outside
> >>> caller press. I assume one of the tones is the actual audio passing
> >>> thru
> >>> the connection and the other generated by the T1 card itself. If I
> >>> make
> >>> the same test with a TDM400 as input connection and the TE410P port as
> >>> output connection, there is no double dialing. Same results if an inside
> >>> extension is used as input connection. It only happens if it's a T1 to
> >>> T1
> >>> Bridge...
> >>>
> >>> If it is a regenerated tone from the TE410, it seems there should be
> >>> some
> >>> option to stop listening for tone touch after connection has been
> >>> established?
> >>>
> >>> Bart
> >>>
> >>>
> >>> ----- Original Message -----
> >>> From: "Walt Reed" <asterisk at linuxguy.com>
> >>> To: "Eric ManxPower Wieling" <eric at fnords.org>
> >>> Cc: "Walt Reed" <asterisk at linuxguy.com>; "Asterisk Users Mailing List -
> >>> Non-Commercial Discussion" <asterisk-users at lists.digium.com>
> >>> Sent: Thursday, November 03, 2005 6:50 AM
> >>> Subject: Re: [Asterisk-Users] Double DTMF with tdm card
> >>>
> >>>
> >>> >Note this is on external calls to external applications.... Not
> >>> >Asterisk
> >>> >DTMF detection. It's as though DTMF is distorted when going through a
> >>> >TDM fxs port, or that it's being caught (too late) and then
> >>> >retransmitted. Does * intercept outgoing dtmf?
> >>> >
> >>> >I haven't found good docs that tell exactly what relaxdtmf does.
> >>> >
> >>> >On Thu, Nov 03, 2005 at 08:01:03AM -0600, Eric ManxPower Wieling said:
> >>> >>Did you try relaxdtmf=no
> >>> >>
> >>> >>Walt Reed wrote:
> >>> >>>Nope - I saw your posts on it though. Very frustrating. I've had to
> >>> >>>discontinue use of my TDM FXS ports until some solution is found.
> >>> >>>
> >>> >>>On Wed, Nov 02, 2005 at 10:18:47AM -0800, Bart Fisher said:
> >>> >>>
> >>> >>>>Did you ever find a solution for this problem? I have it on latest
> >>> >>>>Beta 2
> >>> >>>>
> >>> >>>>Bart
> >>> >>>>
> >>> >>>>
> >>> >>>>----- Original Message -----
> >>> >>>>From: "Walt Reed" <asterisk at linuxguy.com>
> >>> >>>>To: <asterisk-users at lists.digium.com>
> >>> >>>>Sent: Friday, October 21, 2005 7:26 AM
> >>> >>>>Subject: [Asterisk-Users] Double DTMF with tdm card
> >>> >>>>
> >>> >>>>
> >>> >>>>
> >>> >>>>>I have a TDM22B (latest rev), Sipura 2000, and Cisco ATA 186.
> >>> >>>>>Running
> >>> >>>>>CVS HEAD from about a week ago.
> >>> >>>>>
> >>> >>>>>Calls made from a SIP device on either the cisco or sipura work
> >>> >>>>>fine.
> >>> >>>>>
> >>> >>>>>Call made from an analog phone hooked up to one of the FXS ports on
> >>> >>>>>the
> >>> >>>>>TDM22B sound fine, but any DTMF entered after the call is bridged
> >>> >>>>>to
> >>> >>>>>an
> >>> >>>>>outside number (like entering a PIN for a bank or external
> >>> >>>>>conference
> >>> >>>>>bridge) is frequently doubled. Entering 1234 may be recognized as
> >>> >>>>>112344 for example.
> >>> >>>>>
> >>> >>>>>I ran fxotune, and played with the rx and tx gains a little, but
> >>> >>>>>have
> >>> >>>>>been unable to resolve the problem...
> >>> >>>>>
> >>> >>>>>* has no problem dialing outside numbers. It's just DTMf after the
> >>> >>>>>call
> >>> >>>>>is bridged between zap channels...
> >>> >>>>>
> >>> >>>>>Any ideas?
> >>> >>>>>_______________________________________________
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