[Asterisk-Users] Problem with call hold

Joseph Shi joseph at linksoft.com.hk
Mon Feb 28 06:22:03 MST 2005


I got a very strange problem with call-hold function.

For calls that come in from PSTN and route to a SIP extension.  If I put the call on hold, I cannot unhold the call after.  The caller would be left with hold music forever.  A warning message would be shown on the console usually a few seconds after putting the call on hold:

WARNING[17428]: chan_sip.c:686 retrans_pkt: Maximum retries exceeded on call 0457bd4153a66af6241b2ce5217e823 at 192.168.0.3 for seqno 2079 (non-critical Response).

The same unhold function works fine for calls between SIP extensions.

I have searched through wiki but could not find the answer.  If somebody can shred some light on the problem, it will be very much appreciated.

I'm running the Asterisk stable version at Dec 21, 2004.

Thanks ahead.

Joseph Shi

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