Cisco Systems 1.3.0 manual UA Marshal Redirect Server

C-52

SIP Phone

1.INVITE

2.100

10. 403

UA Marshal Redirect Server

3.INVITE

4.302

5.ACK

6.INVITE

7.100

8.403

9.ACK

Feature Server:

Call Blocking

SIP Phone to PSTN: Call Blocking

Figure C-19. Call Flow DIagram: SIP IP Phone to PSTN: Call Blocking