[Sip] SIP Client Transaction

[Vijay Gaur <vgaur@aastra.com>]

Hi,
  RFC 3261 section "17.1.1.1 Overview of INVITE Transaction" specifies the
state machine for Client INVITE transaction. In the diagram if client
transaction state comes to proceeding after receiving 1xx message, no timers
are started. It is not specified that if no message is  received further in
this state, how this transaction will be terminated. There is no timer
specified to clear this transaction. Do we need to start timer B again in
this state and clear the transaction after timer B expiry?
Your feedback is appreciated.
Thanks,
Vijay
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