Been trying to perform a blind transfer for hours with a SIP client I'm
developing (using Sofia). Every time I sent a REFER request, Asterisk
would respond with 202, followed by a NOTIFY containing the ominous
phrase "503 Service Unavailable (can't handle one-legged xfers)".
At first, I thought maybe my SDP isn't good enough. So I copied some
Zoiper SDP. Nope, still receive 503.
So I turned Asterisk debug and verbose up to 11 and went caving in
Asterisk sources. As far as I could tell, it was
ast_bridge_transfer_blind that failed.
Then it hit me... maybe the transfer failed because the bridge hasn't
been created yet? Maybe I'm sending my REFER too soon?
So I added a sleep(1) just before sending my REFER... success?!?
Now, obviously sleep(1) isn't a good solution and I don't recall a
minimum required delay in the specs. Should I wait for the first RTP
packet to arrive? Is this a bug? I'm confused.
--
Dennis Buteyn
Xorcom Ltd
--
_____________________________________________________________________
-- Bandwidth and Colocation Provided by http://www.api-digital.com --
asterisk-dev mailing list
To UNSUBSCRIBE or update options visit:
http://lists.digium.com/mailman/listinfo/asterisk-dev
