Subject: [SIP] Retransmissions

From: Gonzalo Camarillo <[email-masked]>
Date: Tue, 30 May 2000 15:04:06 +0300

Hi,

In section 10.5.1 of the bis document it is said that when UDP is used a
final response is retransmitted until:

1) ACK arrives
2) BYE arrives
3) CANCEL arrives (status code > 299)
4) 7 retransmissions

In section 4.2.5 it is said that CANCEL has to be answered with 487.

So, if a server receives an INVITE and it responses with 400 for
instance. If a CANCEL is received, it will stop sending the 400 and it
will send the 487. It will retransmit the 487 until the ACK for the
INVITE arrives. Does the retransmission counter get re-started (the
server might have retransmitted already some times the 400 response)?

Thanks,

Gonzalo
-- 
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