[SR-Users] CANCEL before INVITE

[David]

Hey,

It's sent when I hit the red button on the phone ( hang up ). It's not 
automated.

David

On 2010-07-06 11:39, Klaus Darilion wrote:
>
>
> Am 06.07.2010 17:04, schrieb Andrei Pelinescu-Onciul:
>> On Jul 06, 2010 at 16:55, Klaus 
>> Darilion<klaus.mailinglists at pernau.at>  wrote:
>>>
>>>
>>> Am 06.07.2010 16:36, schrieb Andrei Pelinescu-Onciul:
>>>> On Jul 06, 2010 at 14:06, Klaus 
>>>> Darilion<klaus.mailinglists at pernau.at>   wrote:
>>>>> Obiously the device is buggy.
>>>>>
>>>>> But there is also on strange thing at Kamailio: it retransmits the
>>>>> CANCEL although it has already received 481 response on the CANCEL
>>>>> request.
>>>>
>>>> The first 481 stops the CANCEL retransmissions, however each 
>>>> additional
>>>> provisional reply received after that will trigger a one-time CANCEL
>>>> retransmission. That's why you see another retransmission after the 
>>>> 481,
>>>> it's the "response" to the 180...
>>>
>>> Cool, nice feature.
>>>
>>> Unfortunately it doesn't help with David's problem, as the phone
>>> obviously does not see the additional CANCEL - probably the phone's
>>> transaction layer responds again with 481.
>>
>> What's strange is that according to the dump it does finally reply with
>> a 487, but 8s after it sent a 481 to the last CANCEL:
>>
>> <- 100
>> CANCEL ->
>> <- 481
>> <- 180
>> CANCEL
>> <-481
>>   [8s]
>> <-487
>
> True. David, is the 47 sent by the phone autonomously or due to some 
> user interaction (e.g. rejecting the call)
>
> regards
> klaus
>
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