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CHAPTER 6 NDA-24305
Page 246
Revision 1.0
CALL COMPLETION TO BUSY SUBSCRIBER (CCBS)
C-148 CALL COMPLETION TO BUSY SUBSCRIBER (CCBS)
1. General Description
This feature allows an Inter-Office Call Back when the calling station and the called station respectively belong
to a different PBX in a Q-SIG network. This feature conforms to ETS 300 366.
Since the Series 7400 software program, CCBS conforming to IS-13870 is also available.
2. Operating Procedure
To set CCBS:
[When using the access code]
1. Station A and Station B are in station-to-station connection.
2. Station C dials the number for Station B; Station C receives Busy Tone.
3. Station C presses the switchhook or dials the last digit of the number for Station B; Station C receives
Special Dial Tone.
Station A
Station B
[Node A] [Node B] [Node C]
Q-SIG/ Q-SIG/
Station C
IS-11572 IS-11572
Station C
Station A
Station B
[Node A] [Node B] [Node C]
Q-SIG/ Q-SIG/
BT
IS-11572 IS-11572
Station C
Station A
Station B
[Node A] [Node B] [Node C]
Q-SIG/ Q-SIG/
SPDT
IS-11572 IS-11572