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SIP Service Examples:
14. Call Management (Incoming Call Screening)

Top Prev Next Start   Reader's guide
01. Call Hold  02. Consultation Hold  03. Music On Hold  04. Transfer: Unattended  05. Transfer: Attended  06. Transfer: Instant Messaging
07. Call Forwarding Unconditional  08. Call Forwarding Busy  09. Call Forwarding No Answer  10. 3-Way Conference: 3rd Party is Added
11. 3-Way Conference: 3rd Party Joins  12. Single Line Extension  13. Find-Me  14. Call Management (Incoming Call Screening)
15. Call Management (Outgoing Call Screening)  16. Call Park  17. Call Pickup  18. Automatic Redial  19. Click to Dial

Call Management (Incoming Call Screening)
Top 1) INVITE (A2B) 2) 305 Use Proxy 3) ACK (A2B) 4) INVITE (via P)
Prev Next 5) 407 Authorization Required 6) ACK (A2P) 7) INVITE (via P) 8) 403 Screening Failure
    9) ACK (A2P) 10) INVITE (A2AS) 11) 200 OK 12) ACK (A2AS)
    13) BYE (AS2A) 14) 200 OK

Call Management (Incoming Call Screening)
Top 1) INVITE (A2B) 2) 305 Use Proxy 3) ACK (A2B) 4) INVITE (via P)
Prev Next 5) 407 Authorization Required 6) ACK (A2P) 7) INVITE (via P) 8) 403 Screening Failure
    9) ACK (A2P) 10) INVITE (A2AS) 11) 200 OK 12) ACK (A2AS)
    13) BYE (AS2A) 14) 200 OK

Call Management (Incoming Call Screening)
Top 1) INVITE (A2B) 2) 305 Use Proxy 3) ACK (A2B) 4) INVITE (via P)
Prev Next 5) 407 Authorization Required 6) ACK (A2P) 7) INVITE (via P) 8) 403 Screening Failure
    9) ACK (A2P) 10) INVITE (A2AS) 11) 200 OK 12) ACK (A2AS)
    13) BYE (AS2A) 14) 200 OK

Call Management (Incoming Call Screening)
Top 1) INVITE (A2B) 2) 305 Use Proxy 3) ACK (A2B) 4) INVITE (via P)
Prev Next 5) 407 Authorization Required 6) ACK (A2P) 7) INVITE (via P) 8) 403 Screening Failure
    9) ACK (A2P) 10) INVITE (A2AS) 11) 200 OK 12) ACK (A2AS)
    13) BYE (AS2A) 14) 200 OK

Call Management (Incoming Call Screening)
Top 1) INVITE (A2B) 2) 305 Use Proxy 3) ACK (A2B) 4) INVITE (via P)
Prev Next 5) 407 Authorization Required 6) ACK (A2P) 7) INVITE (via P) 8) 403 Screening Failure
    9) ACK (A2P) 10) INVITE (A2AS) 11) 200 OK 12) ACK (A2AS)
    13) BYE (AS2A) 14) 200 OK

Call Management (Incoming Call Screening)
Top 1) INVITE (A2B) 2) 305 Use Proxy 3) ACK (A2B) 4) INVITE (via P)
Prev Next 5) 407 Authorization Required 6) ACK (A2P) 7) INVITE (via P) 8) 403 Screening Failure
    9) ACK (A2P) 10) INVITE (A2AS) 11) 200 OK 12) ACK (A2AS)
    13) BYE (AS2A) 14) 200 OK

Call Management (Incoming Call Screening)
Top 1) INVITE (A2B) 2) 305 Use Proxy 3) ACK (A2B) 4) INVITE (via P)
Prev Next 5) 407 Authorization Required 6) ACK (A2P) 7) INVITE (via P) 8) 403 Screening Failure
    9) ACK (A2P) 10) INVITE (A2AS) 11) 200 OK 12) ACK (A2AS)
    13) BYE (AS2A) 14) 200 OK

Call Management (Incoming Call Screening)
Top 1) INVITE (A2B) 2) 305 Use Proxy 3) ACK (A2B) 4) INVITE (via P)
Prev Next 5) 407 Authorization Required 6) ACK (A2P) 7) INVITE (via P) 8) 403 Screening Failure
    9) ACK (A2P) 10) INVITE (A2AS) 11) 200 OK 12) ACK (A2AS)
    13) BYE (AS2A) 14) 200 OK

Call Management (Incoming Call Screening)
Top 1) INVITE (A2B) 2) 305 Use Proxy 3) ACK (A2B) 4) INVITE (via P)
Prev Next 5) 407 Authorization Required 6) ACK (A2P) 7) INVITE (via P) 8) 403 Screening Failure
    9) ACK (A2P) 10) INVITE (A2AS) 11) 200 OK 12) ACK (A2AS)
    13) BYE (AS2A) 14) 200 OK

Call Management (Incoming Call Screening)
Top 1) INVITE (A2B) 2) 305 Use Proxy 3) ACK (A2B) 4) INVITE (via P)
Prev Next 5) 407 Authorization Required 6) ACK (A2P) 7) INVITE (via P) 8) 403 Screening Failure
    9) ACK (A2P) 10) INVITE (A2AS) 11) 200 OK 12) ACK (A2AS)
    13) BYE (AS2A) 14) 200 OK

Call Management (Incoming Call Screening)
Top 1) INVITE (A2B) 2) 305 Use Proxy 3) ACK (A2B) 4) INVITE (via P)
Prev Next 5) 407 Authorization Required 6) ACK (A2P) 7) INVITE (via P) 8) 403 Screening Failure
    9) ACK (A2P) 10) INVITE (A2AS) 11) 200 OK 12) ACK (A2AS)
    13) BYE (AS2A) 14) 200 OK

Call Management (Incoming Call Screening)
Top 1) INVITE (A2B) 2) 305 Use Proxy 3) ACK (A2B) 4) INVITE (via P)
Prev Next 5) 407 Authorization Required 6) ACK (A2P) 7) INVITE (via P) 8) 403 Screening Failure
    9) ACK (A2P) 10) INVITE (A2AS) 11) 200 OK 12) ACK (A2AS)
    13) BYE (AS2A) 14) 200 OK

Call Management (Incoming Call Screening)
Top 1) INVITE (A2B) 2) 305 Use Proxy 3) ACK (A2B) 4) INVITE (via P)
Prev Next 5) 407 Authorization Required 6) ACK (A2P) 7) INVITE (via P) 8) 403 Screening Failure
    9) ACK (A2P) 10) INVITE (A2AS) 11) 200 OK 12) ACK (A2AS)
    13) BYE (AS2A) 14) 200 OK

Call Management (Incoming Call Screening)
Top 1) INVITE (A2B) 2) 305 Use Proxy 3) ACK (A2B) 4) INVITE (via P)
Prev Next 5) 407 Authorization Required 6) ACK (A2P) 7) INVITE (via P) 8) 403 Screening Failure
    9) ACK (A2P) 10) INVITE (A2AS) 11) 200 OK 12) ACK (A2AS)
    13) BYE (AS2A) 14) 200 OK

Last update: November 19, 2009 
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