ISDN Outbound Call Externall caller disconnect first- IP Phone does'nt hang

Answered Question

Hi All

I have issue with the Outbound Calls to External PSTN phones or Mobiles, when they hangup first- the IP phone (CallManager with H323 Gateway -ISDN E1 solution) does not hangup automatically, instead beeps saying "the other person has hangup". This only happens to Outbound calls, the same caller (mobile or PSTN) calling in and disconnecting first will be followed by IP phone hanging up automatically without needing to put the IP phone down manually.

I have a feeling this is outbound POTS dial peer config issue.

Thanks for your help in advance.


isdn switch-type primary-net5


voice call send-alert

voice call convert-discpi-to-prog

voice call carrier capacity active

voice rtp send-recv


controller E1 0/2/0

pri-group timeslots 1-16


interface Serial0/2/0:15

no ip address

isdn switch-type primary-net5

isdn incoming-voice voice

no cdp enable


voice-port 0/2/0:15


dial-peer voice 1 pots

incoming called-number .



dial-peer voice 10 pots


destination-pattern 9T

progress_ind alert enable 8

progress_ind progress enable 8

progress_ind connect enable 8

port 0/2/0:15


Correct Answer by jgross about 9 years 4 months ago



issue the

voice call disc-pi-off

command in global configuration mode.



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Overall Rating: 5 (2 ratings)
ivillegas Tue, 08/28/2007 - 08:09
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try 'isdn negotiate-bchan'


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