Hi, all,

Consider the following case, what are the right values in SDP in INVITE/200?

A                          B
|    INVITE/SDP1    |
|-------------------------->|
|    200/SDP2         |
|<--------------------------|
|    ACK                 |
|-------------------------->|
........................ Call is up

A initiates hold

|  SDP3/sendonly    |
|-------------------------->|
|  SDP4/recvonly     |
|<--------------------------|

B initiates hold
|  SDP5/?               |
|<--------------------------| 
|  SDP6/?               |
|-------------------------->|


A resumes
|  SDP7/?               |
|-------------------------->|
|  SDP8/?               |
|<--------------------------|

B resumes
|  SDP9/?               |
|<--------------------------|
|  SDP10/?             |
|-------------------------->|

Here, the direction attribute value is of interest. From 
http://www.ietf.org/internet-drafts/draft-ietf-sipping-sip-offeranswer-09.txt, 
my understanding is:

SDP5: sendonly
SDP6: inactive

SDP7: sendrecv
SDP8: sendonly

SDP9: sendrecv
SDP10: sendrecv

Is my understanding correct? Can we do as below?

SDP5: inactive
SDP6: inactive
SDP7: recvonly
SDP8: sendonly
SDP9: sendrecv
SDP10: sendrecv

Thanks for the input.

kaiduan


      __________________________________________________________________
Yahoo! Canada Toolbar: Search from anywhere on the web, and bookmark your 
favourite sites. Download it now at
http://ca.toolbar.yahoo.com.

_______________________________________________
Sip-implementors mailing list
Sip-implementors@lists.cs.columbia.edu
https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors

Reply via email to