NEC NEAX 2400 IPX Programming Manual page 306

Q-SIG (CIRCUIT SWITCHED BASIC CALL - ETSI VERSION)
4. Example of Message Sequences
<Enbloc Sending/Call Clearing>
<Overlap Sending/Call Clearing>
After receiving SETUP ACK,
OG PBX shall send CPN by
INFORMATION Message.
CHAPTER 6
Page 288
Revision 1.0
OG PBX
SETUP
CALL PROC
ALERT
CONN
CONN ACK
Call Active
DISC
REL
REL COM
OG PBX
SETUP (CPN=0123)
SETUP ACK
INFO(CPN=4)
INFO (CPN=5)
INFO (CPN=6)
INFO (CPN=7)
INFO (CPN=8)
CALL PROC
ALERT
CONN
CONN ACK
Call Active
DISC
REL
REL COM
NDA-24305
IC PBX
IC PBX
CPN is "012345678", however SETUP does not
include them completely.
IC PBX shall send SETUP ACK as the request
of CPN.
After receiving CPN completely by INFO,
IC PBX shall send CALL PROC.
CPN = Called Party Number
Note: