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SIP Service Examples:
12. Single Line Extension

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
 

Single Line Extension
Top 1) INVITE (A2B) 2) 180 Ringing (B1) 3) 480 Not Logged In (B2) 4) ACK (P to B2)
Prev Next 5) 180 Ringing (B3) 6) 200 OK (B3) CANCEL (B1) 7) ACK (A to B3) 8) 487 (B1 to P)
    9) ACK (P to B1) 10) NOTIFY (B3 to B) 11) Responses (to B3) 12) INVITE (B2 to B)
    13) Responses (B1,B2) 14) ACK (P to B1,B2) 15) 200 OK (B3 to B2) 16) ACK (B2 to B3)

Single Line Extension
Top 1) INVITE (A2B) 2) 180 Ringing (B1) 3) 480 Not Logged In (B2) 4) ACK (P to B2)
Prev Next 5) 180 Ringing (B3) 6) 200 OK (B3) CANCEL (B1) 7) ACK (A to B3) 8) 487 (B1 to P)
    9) ACK (P to B1) 10) NOTIFY (B3 to B) 11) Responses (to B3) 12) INVITE (B2 to B)
    13) Responses (B1,B2) 14) ACK (P to B1,B2) 15) 200 OK (B3 to B2) 16) ACK (B2 to B3)

Single Line Extension
Top 1) INVITE (A2B) 2) 180 Ringing (B1) 3) 480 Not Logged In (B2) 4) ACK (P to B2)
Prev Next 5) 180 Ringing (B3) 6) 200 OK (B3) CANCEL (B1) 7) ACK (A to B3) 8) 487 (B1 to P)
    9) ACK (P to B1) 10) NOTIFY (B3 to B) 11) Responses (to B3) 12) INVITE (B2 to B)
    13) Responses (B1,B2) 14) ACK (P to B1,B2) 15) 200 OK (B3 to B2) 16) ACK (B2 to B3)

Single Line Extension
Top 1) INVITE (A2B) 2) 180 Ringing (B1) 3) 480 Not Logged In (B2) 4) ACK (P to B2)
Prev Next 5) 180 Ringing (B3) 6) 200 OK (B3) CANCEL (B1) 7) ACK (A to B3) 8) 487 (B1 to P)
    9) ACK (P to B1) 10) NOTIFY (B3 to B) 11) Responses (to B3) 12) INVITE (B2 to B)
    13) Responses (B1,B2) 14) ACK (P to B1,B2) 15) 200 OK (B3 to B2) 16) ACK (B2 to B3)

Single Line Extension
Top 1) INVITE (A2B) 2) 180 Ringing (B1) 3) 480 Not Logged In (B2) 4) ACK (P to B2)
Prev Next 5) 180 Ringing (B3) 6) 200 OK (B3) CANCEL (B1) 7) ACK (A to B3) 8) 487 (B1 to P)
    9) ACK (P to B1) 10) NOTIFY (B3 to B) 11) Responses (to B3) 12) INVITE (B2 to B)
    13) Responses (B1,B2) 14) ACK (P to B1,B2) 15) 200 OK (B3 to B2) 16) ACK (B2 to B3)

Single Line Extension
Top 1) INVITE (A2B) 2) 180 Ringing (B1) 3) 480 Not Logged In (B2) 4) ACK (P to B2)
Prev Next 5) 180 Ringing (B3) 6) 200 OK (B3) CANCEL (B1) 7) ACK (A to B3) 8) 487 (B1 to P)
    9) ACK (P to B1) 10) NOTIFY (B3 to B) 11) Responses (to B3) 12) INVITE (B2 to B)
    13) Responses (B1,B2) 14) ACK (P to B1,B2) 15) 200 OK (B3 to B2) 16) ACK (B2 to B3)

Single Line Extension
Top 1) INVITE (A2B) 2) 180 Ringing (B1) 3) 480 Not Logged In (B2) 4) ACK (P to B2)
Prev Next 5) 180 Ringing (B3) 6) 200 OK (B3) CANCEL (B1) 7) ACK (A to B3) 8) 487 (B1 to P)
    9) ACK (P to B1) 10) NOTIFY (B3 to B) 11) Responses (to B3) 12) INVITE (B2 to B)
    13) Responses (B1,B2) 14) ACK (P to B1,B2) 15) 200 OK (B3 to B2) 16) ACK (B2 to B3)

Single Line Extension
Top 1) INVITE (A2B) 2) 180 Ringing (B1) 3) 480 Not Logged In (B2) 4) ACK (P to B2)
Prev Next 5) 180 Ringing (B3) 6) 200 OK (B3) CANCEL (B1) 7) ACK (A to B3) 8) 487 (B1 to P)
    9) ACK (P to B1) 10) NOTIFY (B3 to B) 11) Responses (to B3) 12) INVITE (B2 to B)
    13) Responses (B1,B2) 14) ACK (P to B1,B2) 15) 200 OK (B3 to B2) 16) ACK (B2 to B3)

Single Line Extension
Top 1) INVITE (A2B) 2) 180 Ringing (B1) 3) 480 Not Logged In (B2) 4) ACK (P to B2)
Prev Next 5) 180 Ringing (B3) 6) 200 OK (B3) CANCEL (B1) 7) ACK (A to B3) 8) 487 (B1 to P)
    9) ACK (P to B1) 10) NOTIFY (B3 to B) 11) Responses (to B3) 12) INVITE (B2 to B)
    13) Responses (B1,B2) 14) ACK (P to B1,B2) 15) 200 OK (B3 to B2) 16) ACK (B2 to B3)

Single Line Extension
Top 1) INVITE (A2B) 2) 180 Ringing (B1) 3) 480 Not Logged In (B2) 4) ACK (P to B2)
Prev Next 5) 180 Ringing (B3) 6) 200 OK (B3) CANCEL (B1) 7) ACK (A to B3) 8) 487 (B1 to P)
    9) ACK (P to B1) 10) NOTIFY (B3 to B) 11) Responses (to B3) 12) INVITE (B2 to B)
    13) Responses (B1,B2) 14) ACK (P to B1,B2) 15) 200 OK (B3 to B2) 16) ACK (B2 to B3)

Single Line Extension
Top 1) INVITE (A2B) 2) 180 Ringing (B1) 3) 480 Not Logged In (B2) 4) ACK (P to B2)
Prev Next 5) 180 Ringing (B3) 6) 200 OK (B3) CANCEL (B1) 7) ACK (A to B3) 8) 487 (B1 to P)
    9) ACK (P to B1) 10) NOTIFY (B3 to B) 11) Responses (to B3) 12) INVITE (B2 to B)
    13) Responses (B1,B2) 14) ACK (P to B1,B2) 15) 200 OK (B3 to B2) 16) ACK (B2 to B3)

Single Line Extension
Top 1) INVITE (A2B) 2) 180 Ringing (B1) 3) 480 Not Logged In (B2) 4) ACK (P to B2)
Prev Next 5) 180 Ringing (B3) 6) 200 OK (B3) CANCEL (B1) 7) ACK (A to B3) 8) 487 (B1 to P)
    9) ACK (P to B1) 10) NOTIFY (B3 to B) 11) Responses (to B3) 12) INVITE (B2 to B)
    13) Responses (B1,B2) 14) ACK (P to B1,B2) 15) 200 OK (B3 to B2) 16) ACK (B2 to B3)

Single Line Extension
Top 1) INVITE (A2B) 2) 180 Ringing (B1) 3) 480 Not Logged In (B2) 4) ACK (P to B2)
Prev Next 5) 180 Ringing (B3) 6) 200 OK (B3) CANCEL (B1) 7) ACK (A to B3) 8) 487 (B1 to P)
    9) ACK (P to B1) 10) NOTIFY (B3 to B) 11) Responses (to B3) 12) INVITE (B2 to B)
    13) Responses (B1,B2) 14) ACK (P to B1,B2) 15) 200 OK (B3 to B2) 16) ACK (B2 to B3)

Single Line Extension
Top 1) INVITE (A2B) 2) 180 Ringing (B1) 3) 480 Not Logged In (B2) 4) ACK (P to B2)
Prev Next 5) 180 Ringing (B3) 6) 200 OK (B3) CANCEL (B1) 7) ACK (A to B3) 8) 487 (B1 to P)
    9) ACK (P to B1) 10) NOTIFY (B3 to B) 11) Responses (to B3) 12) INVITE (B2 to B)
    13) Responses (B1,B2) 14) ACK (P to B1,B2) 15) 200 OK (B3 to B2) 16) ACK (B2 to B3)

Single Line Extension
Top 1) INVITE (A2B) 2) 180 Ringing (B1) 3) 480 Not Logged In (B2) 4) ACK (P to B2)
Prev Next 5) 180 Ringing (B3) 6) 200 OK (B3) CANCEL (B1) 7) ACK (A to B3) 8) 487 (B1 to P)
    9) ACK (P to B1) 10) NOTIFY (B3 to B) 11) Responses (to B3) 12) INVITE (B2 to B)
    13) Responses (B1,B2) 14) ACK (P to B1,B2) 15) 200 OK (B3 to B2) 16) ACK (B2 to B3)

Single Line Extension
Top 1) INVITE (A2B) 2) 180 Ringing (B1) 3) 480 Not Logged In (B2) 4) ACK (P to B2)
Prev Next 5) 180 Ringing (B3) 6) 200 OK (B3) CANCEL (B1) 7) ACK (A to B3) 8) 487 (B1 to P)
    9) ACK (P to B1) 10) NOTIFY (B3 to B) 11) Responses (to B3) 12) INVITE (B2 to B)
    13) Responses (B1,B2) 14) ACK (P to B1,B2) 15) 200 OK (B3 to B2) 16) ACK (B2 to B3)

Last update: November 19, 2009 
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