Slight modification as I mentioned "sendrecv" at the at line instead if
"receive-only".

-----Original Message-----
From: sip-implementors-boun...@lists.cs.columbia.edu
[mailto:sip-implementors-boun...@lists.cs.columbia.edu] On Behalf Of
Verma Sunil
Sent: Wednesday, September 22, 2010 3:53 PM
To: goutam kumar; sip-implementors@lists.cs.columbia.edu
Subject: Re: [Sip-implementors] Call HOLD from both sides

Hi,

As per offer answer RFC for media attribute "send-only" response can be
"receive-only" or "inactive".
The choice is at the application to decide what needs to be done.

>From the call scenario I think response should be "inactive" as BOB has
put Alice on hold and has not yet retrieve the call. 

If we look it from user media resource perspective we will be able to
relate it better. BOB might have put Alice on hold and may be talking to
some one else using his SIP Clients RTP Port. Now if application answer
this scenario as "receive-only" then it will create cross talk and
noise.

Regards
Sunil Verma


-----Original Message-----
From: sip-implementors-boun...@lists.cs.columbia.edu
[mailto:sip-implementors-boun...@lists.cs.columbia.edu] On Behalf Of
goutam kumar
Sent: Wednesday, September 22, 2010 3:15 PM
To: sip-implementors@lists.cs.columbia.edu
Subject: [Sip-implementors] Call HOLD from both sides

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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