Cisco Systems 1.3.0 Manuale Utente
Phone to SIP Phone via Gateway: Call Screening
C-45
Phone to SIP Phone via Gateway: Call Screening
Call Scenario
Figure C-16 illustrates the following call scenario:
•
•
User A initiates a call to User B
•
User B has call screening enabled
•
The feature server screene the call and returns a forbidden call message
back to the gateway.
Figure C-16. SIP IP Phone to Phone: Call Screening
Call Flow Diagram
Figure C-17 shows a call, originating from an on-network SIP IP phone,
being screened by the feature server.
being screened by the feature server.
Gateway
User B
PSTN
Called Party
Redirect Server
User Agent
Gateway
Marshal Server
Marshal Server
User A
Calling Party
Calling Party
(Screening)
Call Screening
Feature Server
VOCAL System