Hi,
bis-03 section 17.1 (Redirect server) says "After receiving a request other
than CANCEL, the server gathers the list of alternative locations and
returns a final response of class 3xx or it refuses the request. The
redirect server maintains transaction state for the whole SIP transaction."
a) Does it mean that Redirect returns 3xx for ACK request also? However,
this contradicts the basic rule "ACK doesn't generate any response"
b) Redirect can receive ACK in two ways - acknowledgement of 3xx for INVITE
and erroneous ACK. Since redirect is transaction-based, how does it
discriminate between those two ACKs.
Could someone please clarify?
Thanks in advance,
Anand.
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