Hi,

I'm trying to implement a VOIP call between two endpoints. I'm in a doubt.

Say Alice and Bob are in a call. Now,

STEP I
Alice puts Bob on hold.  i.e.

          INVITE (RTP-sendonly)
Alice -------------------------------------> Bob

          200 OK (RTP-recvonly)
        <------------------------------------

                     ACK
         ------------------------------------->


STEP II
After this Bob puts Alice on hold. i.e.

              INVITE(RTP-inactive)
Alice   <--------------------------------------   Bob

               200 OK (RTP-inactive)
          ---------------------------------------->

                         ACK
          <----------------------------------------

( If Alice has already put the call on hold, then is Step II possible?? )

After this sequence of signaling, say Alice takes the call off hold i.e.

                INVITTE(RTP-sendonly)
Alice   ------------------------------------------->  Bob

                 200 OK (RTP ?????)
          <--------------------------------------------

My Question is:What should bob send as a reply now?
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