NEC NEAX 2400 IPX Programming Manual page 266

CALL COMPLETION TO BUSY SUBSCRIBER (CCBS)
1. Station A and Station B are in station-to-station connection.
Station A
Station B
2. Station C dials the number for Station B; Station C receives Busy Tone.
Station A
Station B
3. Station C presses the feature key for CCBS; Station C receives Service Set Tone and hangs up.
Station A
Station B
CHAPTER 6
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Revision 1.0
Q-SIG/
IS-11572
[Node A] [Node B]
Q-SIG/
IS-11572
[Node A] [Node B]
Q-SIG/
IS-11572
[Node A] [Node B]
NDA-24305
Q-SIG/
IS-11572
Station C
[Node C]
BT
Q-SIG/
IS-11572
[Node C]
SST
Q-SIG/
IS-11572
Station C
[Node C]
Station C