Hi,
I have a question about the following paragraph of section 14.2:
A UAS that receives an INVITE on a dialog while an INVITE it had sent
on that dialog is in progress MUST return a 491 (Request Pending)
response to the received INVITE.
What is exactly meant with 'in progress'? While it has not received a
final response?
--
kind regards,
Sigrid Thijs
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