Hi,
I have the following requirement:
A calls B. If B doesn't answer the call within a configurable period of time,
we should
disconnect the call.
For this, we send a 480 message to A and a CANCEL message to B. The flow
sequence of
messages is like:
A Proxy
<---------------- (480 not available)
(ACK) ---------------->
Proxy B
(CANCEL) -------------------->
<-------------------- (200 OK)
<-------------------- (487 Terminated)
(ACK) ---------------------> [NOT BEING SENT]
However, the problem is that multiple "487 Request Terminated" messages are
coming from B.
I think this is because the proxy doesn't send the ACK for the 487 message at
all. Is this
the normal behavior ? I am using the Ondo Sip server.
thanks,
Venkatesh
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