[Serusers] ipphone---ser---asterisk---ser---pstn

[Iqbal]

I actually left out the ngrep cause it was really messy, so I went 
through and gave a summary, but it definantly resolved itself when I 
changed the canreinvite, and kept asterisk in the media path, will have 
to debug some other time,  I will leave it for now since it works :-)

Iqbal

Greger V. Teigre wrote:

> Hi Iqbal,
> You didn't include an ngrep trace of this, so it's hard to say anything.
> What I can say is that this is a typical "trombone" issue (when SIP 
> and/or RTP goes in a loop). When you do stuff like this, it's really 
> hard to debug ser.cfg, as several INVITEs and other messages go back 
> and forth with the same call-id...
>    I cannot say anything else than that I had been worried too, there 
> is definitely something wrong with the signalling.
> g-)
>
> Iqbal wrote:
>
>> Hi
>>
>> I am setting up the following
>>
>> ipphone registered with ser, the username on ipphone belongs to
>> special group called "asterisk"
>> when he makes call, I append a prefix, and route his calls to
>> asterisk.
>> The prefix is appended because I have several "special" groups which
>> all hit different extensions in asterisk.
>>
>> Anyhow this call gets to asterisk, where I then do a few mysql queries
>> to find which group/company this user belongs to and then drop them
>> into the correct context for their company.
>>
>> For any of these special users then need to dial 9[number] to route
>> the call outside their corporate network, otherwise they can all dial
>> internally using 3 digit numbers.
>>
>> The problem that I have got is that the calls get through okay, and
>> both side can talk, but
>> a) the call setup takes time
>> b) the sip debug just does not seem correct, in fact its got way too
>> much going on for my liking.
>>
>> setup, iphone ------ser------asterisk
>>                               |
>>                               |
>>                            pstn GW
>>
>> ngrep
>> --------
>> iphone  invite to SER
>> SER ---100 trying ---> ipphone
>> SER --- INVITE ---> asterisk
>> Asterisk ----> 100 trying ----> SER
>> Atsreisk ----INVITE ----> SER
>> SER -----100 trying -----> Asterisk
>> SER -----INVITE ---PSTN GW
>> PSTN GW ----100 trying -----> SER
>> PSTN GW ----> 183 session progress ----> SER
>> SER ---- 183 session progress ----> Asterisk
>> Asterisk ----183--->ser
>> ser .-----183 ---> ipphone
>> PSTN GW ----200 OK ---> SER
>> SER -----200 OK ---->  Ast
>> Ast ----ACK ----> SER
>> SER ----ACK ---> GW
>> AST ----OK ----> SER
>> SER ----OK ----IPphone
>> ipphone ----ACK ---> SER
>> SER ------ACK ---AST
>>
>> Now around about here is where I think it should stop, cause it all
>> seems to make sense...but heres where is starts to go wrong, I then
>> get
>> Ast ---INVITE ---> ser
>> ser ----> 404 User Not found ----> ast
>> ast ---ack ---> ser
>> ser ---ack ---> gw
>> ser ---invite --ast
>>
>> and various combos of this, but the call is going through. I am
>> particularly concerned with the user not found part, since asterisk ip
>> is trusted and the call does go through.
>>
>> Iqbal
>>
>>
>>
>>
>> _______________________________________________
>> Serusers mailing list
>> serusers at lists.iptel.org
>> http://lists.iptel.org/mailman/listinfo/serusers 
>
>
>
> .
>