Nortel Networks NN10265-111 - Manual (Page 112)

NN10265-111 MCS 5100 3.5 Standard 4.0 January 2006
112 Copyright © Nortel Networks Limited 2006
The following sections provide some sample diagrams and descriptions
of call flows to review the basic functionality of the RTP Media Portal
component.
Basic call without firewalls
Figure 53, Basic call flow using the RTP Media Portal (unobscured
endpoints), on page 112
shows the basic call flow for a client-to-client
call using an RTP Media Portal without any firewall/NAPT traversal
requirements.
Figure 53 Basic call flow using the RTP Media Portal (unobscured endpoints)
SIP
Module
Application
Client A Client B
3. Response with A’
1. Invite (SDP of B)
9. BYE
11. Delete Resource A’
RTP
Portal
Media
5. Answer/OK (SDP of B)
10. BYE
12. Delete Resource B’
8. Answer/OK (SDP of B’)
14. Resource Deleted
13. Response Deleted
7. Response with B’
2. Resource Request for B
4. Invite (SDP of A’)
Media Path established between A and B
6. Resource response for A
Connect new resource to A’