[Users] Re: un-asked-for CANCEL being generated

Bogdan-Andrei Iancu bogdan at voice-system.ro
Thu Apr 12 15:20:02 CEST 2007

Hi Mark,

I would say the problem is with the UAS (NETA Phone release 1009u stamp 
39129) - I see it accepts the call, sends 200 OK and  than sends 400 Bad 

first it should not send another final response after 200 and secondly 
it should not use 400 if it is not parse/format error (which it doesn't 
seams to).

my guess is this has something to do with the fact that the 200 ACK does 
not get to this UAS - the trace shows the ACK only from UAC to proxy. 
Maybe the missing ACK triggers this bogus reaction of 400 reply.

try to fix the ACK problem and report the error to the device manufacture.


Mark Price wrote:
> Ok, third try.  Previous messages have been blocked for too much text.
> This is an ngrep log attached (i have pcap if you want, but it was
> blocked by the mail server).
> destination number is 9043067833.
> The softphone is
> The sip proxy is
> Asterisk is
> On 4/11/07, Bogdan-Andrei Iancu <bogdan at voice-system.ro> wrote:
>> Hi Mark,
>> yes, please send some trace.
>> regards,
>> bogdan
> ------------------------------------------------------------------------

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