hello all,
for first sorry for my english.
I have an issue with SIP "mid-call mobility" scenario. I'm using Asterisk
(that act as sip server) and 2 softphone clients, all in the same
subnetwork.
I make a call from softphone A to B and in the middle of the call the client
B moves to another subnetwork. The client B then obtain a new IP address via
DHCP in the new subnetwork and take back the call with client A.
The problem is that i got no SIP signaling nor any new INVITE message (as
stated in this document:
http://www.cs.columbia.edu/~hgs/papers/Wedl9908_Mobility.pdf in section 3.2)
from client B to inform A about it's new IP address, but the RTP flow is
directed to the correct host so the call can continue.
In addition, after B moves and A hangup the call, the "BYE" message is
directed to the old IP address of  B. I tried several softphone client, but
no luck to see that new INVITE message. How is possible that A sends RTP
correctly to new-B if he don't know yet the new IP address?
Don't know where is the problem

Regards,
Treuz
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