VOCAL User Agent

UA Marshal

VOCAL User Agent

VOCAL User Agent

User

Agent to

1.

INVITE

 

 

 

2.

100

 

 

 

 

 

3. INVITE

 

 

User

 

 

 

 

 

 

 

4. 180

 

 

Agent:

 

 

 

 

 

5.

180

 

 

 

Blind

 

 

6. 200

 

 

 

 

 

 

Transfer

7.

200

 

 

 

8.

ACK

 

 

 

 

 

 

 

 

 

9. ACK

 

 

 

10. INVITE

 

 

 

 

11. 100

 

 

 

 

 

 

12. INVITE

 

 

 

 

 

13. 200

 

 

 

14. 200

 

 

 

 

15. ACK

 

 

 

 

Figure C-39. User Agent to User Agent: Blind Transfer — Diagram 1

C-123

Page 179
Image 179
Cisco Systems 1.3.0 manual Figure C-39. User Agent to User Agent Blind Transfer Diagram