RFC 3261, "SIP: Session Initiation Protocol", June 2002

Errata ID: 3875
Status: Held for Document Update
Type: Technical
Publication Format(s) : TEXT
Reported By: Varun Bharadwaj S V
Date Reported: 2014-01-31
Held for Document Update by: Richard Barnes
Date Held: 2014-02-15

Section 17 says:

17 Transcations

 - Additionally, in the case of an INVITE request, the client
transaction is responsible for generating the ACK request for any
final response accepting a 2xx response.

It should say:

17 Transcations

 - Additionally, in the case of an INVITE request, the client
transaction is responsible for generating the ACK request for any
final response excepting a 2xx response.

Notes:

Client transaction should generate the ACK except for 2xx responses.It should not accept & generate the ACK for 2xx response.
For Server transaction RFC says - "In the case of an INVITE transaction, it absorbs the ACK request for any final response excepting a 2xx response."

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