At 13:47 4/19/2007, Jeronimo Romero wrote:
Running asterisk 1.2.7 with latest zaptel on centos4.4. with Aastra
55i phones. Local outbound calling works fine, but ATT requires
clients enter 7 digit code for long distance. All calls with 7 digit
code are lost within 20 seconds of the call. This is the message I'm getting:
Apr 19 12:38:16 WARNING[9615]: chan_sip.c:1228 retrans_pkt: Maximum
retries exceeded on transmission
[EMAIL PROTECTED] for seqno 783509378
(Critical Response)
Apr 19 12:38:16 WARNING[9615]: chan_sip.c:1245 retrans_pkt: Hanging
up call [EMAIL PROTECTED] - no reply to
our critical packet.
The strange thing is that when I use an xten softphone this issue
does not occur. Is this a SIP signaling issue? Any help would be
appreciated. This issue does not occurr with any other ip phone on
our network. ONLY THE AASTRAs. any ideas?
For the record, we fixed this on our 1.2.18 system by
recompiling per Brian Jones:
=====================================================================
http://lists.digium.com/pipermail/asterisk-users/2007-April/184875.html
The Cisco proxy was not replying to Asterisk with an ACK after *
sent an OK.
Since version 1.2.14, * was changed so that not receiving an ACK to an OK is
considered a FATAL error.
The specific change that causes this problem is in sip_answer() in
chan_sip.c:
res = transmit_response_with_sdp(p, "200 OK", &p->initreq, 2);
Changing the 2 to a 1 will probably fix it. Note that this is NOT a bug in
* but improper implementations--either caused by latency, or a software bug
(not sending an ACK). Perhaps it might be beneficial to have an option in
sip.conf to change how * handles not receiving an ACK? I know... it's
someone else's problem, but might help those of us stuck with buggy
implementations in production environments. :)
Brian.
=====================================================================
Calls using 4 digit account codes now do not drop after 20 seconds.
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