[Serusers] Problem with CANCEL messages and Cisco 7905

[Atle Samuelsen]

Hi Kristian,

"Hur er leget?"

Related to your problem, I think you might be running a little
old version of the Software on your 7905. Try to upgrade to latest
software on it. I know that on cisco 7960 there was this problem some
time back that they changed the callid or something stupid.

-A

* Kristian Larsson <kristian at netatonce.se> [061108 02:21]:
> Hey!
> 
> This is my first time posting to the list,
> although I'm a long time reader :)
> 
> I have searched the archives as well as the
> internet and found no solution or answer to this
> so far. Perhaps my Google Kung Fu isn't what it
> should be.
> 
> Anyhow, I have a cisco 7905 phone working
> together with a SER machine. When dialing to the
> 7905 phone from another phone and hanging up on
> the caller phone before answering the 7905, ie
> CANCEL before the call has actually been setup, I
> get a "SIP/2.0 481 Call Leg/Transaction Does Not Exist."
> back from the Cisco phone.
> 
> It's a pretty basic configuration (basically the
> one used in the examples for call forwarding).
> What I want to know is how the phone identifies a
> Call Leg/Transaction. I have used ngrep quite
> extensively and found nothing.
> Most values in both the INVITE and CANCEL message
> are equal. 
> 
> I've also got a Thomson ATA box which does not
> show the same behaviour despite being connected to
> the same SER.
> 
> What values are used to identify a transaction,
> how can I see if two messages are of the same
> transaction?
> 
> Perhaps this is actually a user agent problem, but
> I don't really know where to turn for help with
> this 7905 (Cisco only provides support if you use
> their Call Manager solution).
> 
> regards,
>    Kristian.
> 
> -- 
> Kristian Larsson                                         KLL-RIPE
> Network Engineer                            Net At Once [AS35706]
> email: kristian at netatonce.se                      irc: kll at ircnet
> phone: +46 470 592717                        cell: +46 704 910401                       
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