[RTPproxy Users] Status 481 Call Leg/Transaction Does Not Exist

[Josip Djuricic]

Dear I am trying to do call transfer, but it fails with SIP 481 message.

 

Scenario is like this:

2 phones registered to SER

 

 

Phone 1 <-----> SER <-----> Phone 2

 

When making a call SER forwards all meassages to b2bua, b2bua asks radius
(gets all necessary info, routes ...etc) and sends call to Phone 2. The call
is sucesfully established, and everything works as expected in both ways.
Now the problem starts when I want to do Call Transfer, because I
immediatelly after establishing second line to the Phone 3 get SIP 481 Call
Leg/Transaction Does Not Exist. I get the same thing if I try to put caller
on HOLD from the party that answered the Call.

 

Phone1 -----> SER -----> B2BUA -----> Phone 2  ----xfer-----> B2BUA ----->
SIP 481

 

I am attaching b2bua log and also attaching sip and radius tcpdump.

 

P.S. 

There is no NAT involved, I am just using private ips with direct routing
for test

P.P.S.

I have done only one modification to b2bua_radius.py to change xpkg-routing
parameter to be compatible with our billing/routing engine (just to expect
different radius attrib and it works fine)

 

Best regards,

 

Josip

 

 

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