asterisk users - Mar 2005 - Nortel ATA not passing dtmf tones to fxo

I am trying to integrate a Nortel Norstar system with an Asterisk service
using a TDM04B card (4 fxo).  So far everyting works from Asterisk to Nortel.
 The problem is when someone dials from the Nortel PBX to the Asterisk server.
 Asterisk answers the call and provides a dialtone (with DISA) but appartently
the DTMF tones are not passed to asterisk and the call cannot proceed.

    This only happens when calling from a digital phone on the Nortel.  If I
connect an analog phone to the PBX and dial from there the call can go
through.  Anyone has experience with this?

--
Carlos Chavez
Director de Tecnolog?a
Telecomunicaciones Abiertas de M?xico S.A. de C.V.
Tel: +52-55-91169161 Ext 2001

I fought with this and made the same discovery you did.  

I'm not happy with my solution, but I have SPA-3000s set up in a
"hotline"
mode.  when a call comes into them from the Nortel ATA it is automatically
routed to an Aserisk Extension.  I hope somebody else chimes in with an ATA
setting to change or something.

-Nate

-----Original Message-----
From: Carlos Chavez [mailto:cursor@telecomabmex.com] 
Sent: Tuesday, March 08, 2005 3:30 PM
To: Asterisk
Subject: [Asterisk-Users] Nortel ATA not passing dtmf tones to fxo



     I am trying to integrate a Nortel Norstar system with an Asterisk
service using a TDM04B card (4 fxo).  So far everyting works from Asterisk
to Nortel.  The problem is when someone dials from the Nortel PBX to the
Asterisk server.  Asterisk answers the call and provides a dialtone (with
DISA) but appartently the DTMF tones are not passed to asterisk and the call
cannot proceed.

    This only happens when calling from a digital phone on the Nortel.  If I
connect an analog phone to the PBX and dial from there the call can go
through.  Anyone has experience with this?

--
Carlos Chavez
Director de Tecnolog?a
Telecomunicaciones Abiertas de M?xico S.A. de C.V.
Tel: +52-55-91169161 Ext 2001

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Carlos Chavez wrote:
>      I am trying to integrate a Nortel Norstar system with an Asterisk
service
> using a TDM04B card (4 fxo).  So far everyting works from Asterisk to
Nortel.
>  The problem is when someone dials from the Nortel PBX to the Asterisk
server.
>  Asterisk answers the call and provides a dialtone (with DISA) but
appartently
> the DTMF tones are not passed to asterisk and the call cannot proceed.
> 
>     This only happens when calling from a digital phone on the Nortel.  If
I
> connect an analog phone to the PBX and dial from there the call can go
> through.  Anyone has experience with this?
> 
> --
> Carlos Chavez
> Director de Tecnolog?a
> Telecomunicaciones Abiertas de M?xico S.A. de C.V.
> Tel: +52-55-91169161 Ext 2001
> 
> _______________________________________________
> Asterisk-Users mailing list
> Asterisk-Users@lists.digium.com
> http://lists.digium.com/mailman/listinfo/asterisk-users
> To UNSUBSCRIBE or update options visit:
>    http://lists.digium.com/mailman/listinfo/asterisk-users
> 
> 
Yes the norstar is a piece of work. We have the same problem. The only solution 
is to dial asterisk then press feature 808 on your digital phone then the phone 
system will pass the dtmf - what a crock!

HTH,
Steve

-- 

"They that give up essential liberty to obtain temporary safety,
deserve neither liberty nor safety."  (Ben Franklin)

"The course of history shows that as a government grows, liberty
decreases."  (Thomas Jefferson)

> Yes the norstar is a piece of work. We have the same problem. The 
> only solution is to dial asterisk then press feature 808 on your 
> digital phone then the phone system will pass the dtmf - what a crock!
> 
     How do you press feature 808 on the phone?

--
Carlos Chavez
Director de Tecnolog?a
Telecomunicaciones Abiertas de M?xico S.A. de C.V.
Tel: +52-55-91169161 Ext 2001

> Yes the norstar is a piece of work. We have the same problem. The 
> only solution is to dial asterisk then press feature 808 on your 
> digital phone then the phone system will pass the dtmf - what a crock!
> 
     After speaking to the people in charge of the Nortel PBX they asked if it
is possible to change the DTMF duration in Asterisk to a maximum of 120ms? 
They say that their system only sends tones of that length and that is why
Asterisk does not detect the tones.  Can this parameter be manipulated on
Asterisk?  Is it Asterisk or Zaptel who is responsible for this?

--
Carlos Chavez
Director de Tecnolog?a
Telecomunicaciones Abiertas de M?xico S.A. de C.V.
Tel: +52-55-91169161 Ext 2001