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# SIP RFC3261's Example  
# SIP Protocol Structure
# SIP Dialogs & Routing
# SIP Service Examples
 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 Conf: 3rd Party Added
 11.3-Way Conf: 3rd Party Joins
 12.Find-Me
 13.Incoming Call Screening
 14.Outgoing Call Screening
 15.Call Park
 16.Call Pickup
 17.Automatic Redial
 18.Click to Dial
# ABNF Grammars
  - SIP Messages & URIs
  - SIP Headers
  - SIP Private Headers
  - SDP
  - URI Generic Syntax
  - ABNF Notation & Rules
# Cryptography Basics

SIP Service Examples:
16. Call Pickup

Call Pickup
Top 1) INVITE (A2B) 2) 180 Ringing 3) SUBSCRIBE (Bill to Bob) 4) 200 OK
Prev Next 5) NOTIFY (Bob to Bill) 6) 200 OK 7) INVITE (B2A Repl:Bob) 8) 200 OK + CANCEL
    9) ACK (B2A) 10) 487 Terminated 11) ACK 12) NOTIFY (Bob to Bill)
    13) 481 Does Not Exist 14) BYE (A2B) 15) 200 OK

Call Pickup
Top 1) INVITE (A2B) 2) 180 Ringing 3) SUBSCRIBE (Bill to Bob) 4) 200 OK
Prev Next 5) NOTIFY (Bob to Bill) 6) 200 OK 7) INVITE (B2A Repl:Bob) 8) 200 OK + CANCEL
    9) ACK (B2A) 10) 487 Terminated 11) ACK 12) NOTIFY (Bob to Bill)
    13) 481 Does Not Exist 14) BYE (A2B) 15) 200 OK

Call Pickup
Top 1) INVITE (A2B) 2) 180 Ringing 3) SUBSCRIBE (Bill to Bob) 4) 200 OK
Prev Next 5) NOTIFY (Bob to Bill) 6) 200 OK 7) INVITE (B2A Repl:Bob) 8) 200 OK + CANCEL
    9) ACK (B2A) 10) 487 Terminated 11) ACK 12) NOTIFY (Bob to Bill)
    13) 481 Does Not Exist 14) BYE (A2B) 15) 200 OK

Call Pickup
Top 1) INVITE (A2B) 2) 180 Ringing 3) SUBSCRIBE (Bill to Bob) 4) 200 OK
Prev Next 5) NOTIFY (Bob to Bill) 6) 200 OK 7) INVITE (B2A Repl:Bob) 8) 200 OK + CANCEL
    9) ACK (B2A) 10) 487 Terminated 11) ACK 12) NOTIFY (Bob to Bill)
    13) 481 Does Not Exist 14) BYE (A2B) 15) 200 OK

Call Pickup
Top 1) INVITE (A2B) 2) 180 Ringing 3) SUBSCRIBE (Bill to Bob) 4) 200 OK
Prev Next 5) NOTIFY (Bob to Bill) 6) 200 OK 7) INVITE (B2A Repl:Bob) 8) 200 OK + CANCEL
    9) ACK (B2A) 10) 487 Terminated 11) ACK 12) NOTIFY (Bob to Bill)
    13) 481 Does Not Exist 14) BYE (A2B) 15) 200 OK

Call Pickup
Top 1) INVITE (A2B) 2) 180 Ringing 3) SUBSCRIBE (Bill to Bob) 4) 200 OK
Prev Next 5) NOTIFY (Bob to Bill) 6) 200 OK 7) INVITE (B2A Repl:Bob) 8) 200 OK + CANCEL
    9) ACK (B2A) 10) 487 Terminated 11) ACK 12) NOTIFY (Bob to Bill)
    13) 481 Does Not Exist 14) BYE (A2B) 15) 200 OK

Call Pickup
Top 1) INVITE (A2B) 2) 180 Ringing 3) SUBSCRIBE (Bill to Bob) 4) 200 OK
Prev Next 5) NOTIFY (Bob to Bill) 6) 200 OK 7) INVITE (B2A Repl:Bob) 8) 200 OK + CANCEL
    9) ACK (B2A) 10) 487 Terminated 11) ACK 12) NOTIFY (Bob to Bill)
    13) 481 Does Not Exist 14) BYE (A2B) 15) 200 OK

Call Pickup
Top 1) INVITE (A2B) 2) 180 Ringing 3) SUBSCRIBE (Bill to Bob) 4) 200 OK
Prev Next 5) NOTIFY (Bob to Bill) 6) 200 OK 7) INVITE (B2A Repl:Bob) 8) 200 OK + CANCEL
    9) ACK (B2A) 10) 487 Terminated 11) ACK 12) NOTIFY (Bob to Bill)
    13) 481 Does Not Exist 14) BYE (A2B) 15) 200 OK

Call Pickup
Top 1) INVITE (A2B) 2) 180 Ringing 3) SUBSCRIBE (Bill to Bob) 4) 200 OK
Prev Next 5) NOTIFY (Bob to Bill) 6) 200 OK 7) INVITE (B2A Repl:Bob) 8) 200 OK + CANCEL
    9) ACK (B2A) 10) 487 Terminated 11) ACK 12) NOTIFY (Bob to Bill)
    13) 481 Does Not Exist 14) BYE (A2B) 15) 200 OK

Call Pickup
Top 1) INVITE (A2B) 2) 180 Ringing 3) SUBSCRIBE (Bill to Bob) 4) 200 OK
Prev Next 5) NOTIFY (Bob to Bill) 6) 200 OK 7) INVITE (B2A Repl:Bob) 8) 200 OK + CANCEL
    9) ACK (B2A) 10) 487 Terminated 11) ACK 12) NOTIFY (Bob to Bill)
    13) 481 Does Not Exist 14) BYE (A2B) 15) 200 OK

Call Pickup
Top 1) INVITE (A2B) 2) 180 Ringing 3) SUBSCRIBE (Bill to Bob) 4) 200 OK
Prev Next 5) NOTIFY (Bob to Bill) 6) 200 OK 7) INVITE (B2A Repl:Bob) 8) 200 OK + CANCEL
    9) ACK (B2A) 10) 487 Terminated 11) ACK 12) NOTIFY (Bob to Bill)
    13) 481 Does Not Exist 14) BYE (A2B) 15) 200 OK

Call Pickup
Top 1) INVITE (A2B) 2) 180 Ringing 3) SUBSCRIBE (Bill to Bob) 4) 200 OK
Prev Next 5) NOTIFY (Bob to Bill) 6) 200 OK 7) INVITE (B2A Repl:Bob) 8) 200 OK + CANCEL
    9) ACK (B2A) 10) 487 Terminated 11) ACK 12) NOTIFY (Bob to Bill)
    13) 481 Does Not Exist 14) BYE (A2B) 15) 200 OK

Call Pickup
Top 1) INVITE (A2B) 2) 180 Ringing 3) SUBSCRIBE (Bill to Bob) 4) 200 OK
Prev Next 5) NOTIFY (Bob to Bill) 6) 200 OK 7) INVITE (B2A Repl:Bob) 8) 200 OK + CANCEL
    9) ACK (B2A) 10) 487 Terminated 11) ACK 12) NOTIFY (Bob to Bill)
    13) 481 Does Not Exist 14) BYE (A2B) 15) 200 OK

Call Pickup
Top 1) INVITE (A2B) 2) 180 Ringing 3) SUBSCRIBE (Bill to Bob) 4) 200 OK
Prev Next 5) NOTIFY (Bob to Bill) 6) 200 OK 7) INVITE (B2A Repl:Bob) 8) 200 OK + CANCEL
    9) ACK (B2A) 10) 487 Terminated 11) ACK 12) NOTIFY (Bob to Bill)
    13) 481 Does Not Exist 14) BYE (A2B) 15) 200 OK

Call Pickup
Top 1) INVITE (A2B) 2) 180 Ringing 3) SUBSCRIBE (Bill to Bob) 4) 200 OK
Prev Next 5) NOTIFY (Bob to Bill) 6) 200 OK 7) INVITE (B2A Repl:Bob) 8) 200 OK + CANCEL
    9) ACK (B2A) 10) 487 Terminated 11) ACK 12) NOTIFY (Bob to Bill)
    13) 481 Does Not Exist 14) BYE (A2B) 15) 200 OK

Last update: November 19, 2009 
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