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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:
08. Call Forwarding Busy

Call Forwarding Busy
Top 1) INVITE (A2B) 2) 486 Busy 3) ACK (P2B) 4) Call is Being Forwarded 5) 180 Ringing
Prev Next 6) 200 OK 7) ACK (A2B) 8) BYE (A2B) 9) 200 OK

Call Forwarding Busy
Top 1) INVITE (A2B) 2) 486 Busy 3) ACK (P2B) 4) Call is Being Forwarded 5) 180 Ringing
Prev Next 6) 200 OK 7) ACK (A2B) 8) BYE (A2B) 9) 200 OK

Call Forwarding Busy
Top 1) INVITE (A2B) 2) 486 Busy 3) ACK (P2B) 4) Call is Being Forwarded 5) 180 Ringing
Prev Next 6) 200 OK 7) ACK (A2B) 8) BYE (A2B) 9) 200 OK

Call Forwarding Busy
Top 1) INVITE (A2B) 2) 486 Busy 3) ACK (P2B) 4) Call is Being Forwarded 5) 180 Ringing
Prev Next 6) 200 OK 7) ACK (A2B) 8) BYE (A2B) 9) 200 OK

Call Forwarding Busy
Top 1) INVITE (A2B) 2) 486 Busy 3) ACK (P2B) 4) Call is Being Forwarded 5) 180 Ringing
Prev Next 6) 200 OK 7) ACK (A2B) 8) BYE (A2B) 9) 200 OK

Call Forwarding Busy
Top 1) INVITE (A2B) 2) 486 Busy 3) ACK (P2B) 4) Call is Being Forwarded 5) 180 Ringing
Prev Next 6) 200 OK 7) ACK (A2B) 8) BYE (A2B) 9) 200 OK

Call Forwarding Busy
Top 1) INVITE (A2B) 2) 486 Busy 3) ACK (P2B) 4) Call is Being Forwarded 5) 180 Ringing
Prev Next 6) 200 OK 7) ACK (A2B) 8) BYE (A2B) 9) 200 OK

Call Forwarding Busy
Top 1) INVITE (A2B) 2) 486 Busy 3) ACK (P2B) 4) Call is Being Forwarded 5) 180 Ringing
Prev Next 6) 200 OK 7) ACK (A2B) 8) BYE (A2B) 9) 200 OK

Call Forwarding Busy
Top 1) INVITE (A2B) 2) 486 Busy 3) ACK (P2B) 4) Call is Being Forwarded 5) 180 Ringing
Prev Next 6) 200 OK 7) ACK (A2B) 8) BYE (A2B) 9) 200 OK

Last update: November 19, 2009 
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