[cisco-voip] FXO disconnect problem with Panasonic KX-TD500

[Teodor Georgiev]

       Hi, 


 I was fighting such an issue with KX-TD500 and KX-TD1232 more than two years. There is a solution, but not an universal one.
Here is the problem:

Cisco (as most of the other voice gateways with analog FXO ports) can not detect the disconnect "tone" from the Panasonic.
Guess why, because the Panasonic PBX does not send a "busy" tone after the call is completed, but sends an usual dial-tone.
So, what you need is to tune the decadence / frequency settings in order to have working disconnect supervision.

Unfortunately, you can not configure the Panasonic to send "hardware" line supervision signal such as "polarity reversal". In Panasonic
you can purchase an FXO-port card that can detect polarity reversal from the other side (usually - the PTT), but you can not configure the FXS 
ports of the Panasonic to generate polarity reversal signal once a call is started / completed.

I will try to find the frequency/decadence values. I made it working on a Welltech (Micronet) gateway.

  ----- Original Message ----- 
  From: marvin_mejia at epson.co.cr 
  To: cisco-voip at puck.nether.net 
  Sent: Thursday, July 14, 2005 11:50 PM
  Subject: [cisco-voip] FXO disconnect problem with Panasonic KX-TD500



           We have a Cisco 2800 with a FXO card connected to a Panasonic KX-TD500, with the same problem presented by Juraj Kovac around a year ago. 
          Has anyone solved this problem? 


  Thanks in advance, 


  https://puck.nether.net/pipermail/cisco-voip/2004-July/001015.html 

  Juraj Kovac jkovac at cnc.sk 
  Wed Jul 14 13:18:28 EDT 2004 
    a.. Previous message: [cisco-voip] authentication 
    b.. Next message: [cisco-voip] In-band DTMF with Cisco Call Manager 
    c.. Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] 

----------------------------------------------------------------------------

    Hello,

    I have Cisco1760 with voice FXO card connected to Panasonic 616. I have 
    problem when call is ended on the other side FXO port remains in off-hook 
    state ad infinity until it is shuting down manually. I tried any combinations 
    of supervisory disconnect settings (signal, anytone, dualtone pre-connect, 
    dualtone mid-call) and I also tried every cptone locale settings.
    I see that the router canot recognize BUSY tone from PBX when other side 
    closes connection. Where the problem is? Does it have relationship to the 
    cptone locale settings? Have I define cptone-custom settings? In this case I 
    need freq-pair and cadence settings for all types of progress tones of this 
    type of PBX.
    My IOS version is 12.2.15T5. I have the following settings on FXO port:

    voice-port 2/0
    playout-delay nominal 1500
    playout-delay mode fixed
    no comfort-noise
    timeouts initial 30
    timeouts interdigit 6
    timeouts wait-release 10
    description ### Extension 17 ###
    supervisory disconnect dualtone mid-call
    no battery-reversal

    ---> cptone US default


    I am including tracing of the problem:

    When all is idle:
    prompt>sh voice call sum
    PORT           CODEC    VAD VTSP STATE            VPM STATE
    ============== ======== === ==================== ======================
    2/0             -         -  -                     FXOLS_ONHOOK
    2/1             -         -  -                     FXOLS_ONHOOK

    I am calling extension 17:

    prompt>sh voice call sum
    PORT           CODEC    VAD VTSP STATE            VPM STATE
    ============== ======== === ==================== ======================
    2/0             -         -  -                     FXOLS_WAIT_RING_MIN
    2/1             -         -  -                     FXOLS_ONHOOK

    after 1st ring router responds with dial tone:

    prompt>sh voice call sum
    PORT           CODEC    VAD VTSP STATE            VPM STATE
    ============== ======== === ==================== ======================
    2/0             None      y  S_DIGIT_COLLECT       FXOLS_PROCEEDING
    2/1             -         -  -                     FXOLS_ONHOOK

    I hang up the phone. Router waits 30 s for digit collection (timeouts 
    initial). After this timeout router enters WAIT_RELEASE state:

    prompt>sh voice call sum
    PORT           CODEC    VAD VTSP STATE            VPM STATE
    ============== ======== === ==================== ======================
    2/0             None      y  S_WAIT_RELEASE_NC     FXOLS_PROCEEDING
    2/1             -         -  -                     FXOLS_ONHOOK

    In this state router remains ad infinity.



    Thanks,



------------------------------------------------------------------------------


  _______________________________________________
  cisco-voip mailing list
  cisco-voip at puck.nether.net
  https://puck.nether.net/mailman/listinfo/cisco-voip
-------------- next part --------------
An HTML attachment was scrubbed...
URL: https://puck.nether.net/pipermail/cisco-voip/attachments/20050717/3bd44d40/attachment.html