about offer/answer model

rocky001

<p></p><div><span class="476064701-29122007"><font size="2">&nbsp;&nbsp; In the scenario of session timer, AS acts as the refresher and send a UPDATE to the endpoint without a SDP body,</font></span></div><div><span class="476064701-29122007"><font size="2">&nbsp;&nbsp; but the endpoint returns a 200 OK&nbsp;with a SDP.&nbsp;Does this action allowed?</font></span></div><div><span class="476064701-29122007"><font size="2">&nbsp;&nbsp; </font></span></div><div><span class="476064701-29122007"><font size="2">&nbsp;&nbsp; Thanks in advance.</font></span></div>