NEC NEAX 2400 IPX Programming Manual page 305

2. Physical Interface
The physical interface is a 1.5 Mbps digital interface.
A maximum of 60 B-channels are controlled by a single Data Link channel.
Legend:
3. Interworking with Other Network
Q-SIG is available to the following connection and interworking with the other network.
ISDN
Existing Office
Q-SIG (CIRCUIT SWITCHED BASIC CALL - ETSI VERSION)
PBX
DTI
DTI
: D-channel
: B-channel
ACIS
CCIS
Existing Office
NDA-24305
Logical interface
Logical interface
NEC
Q-SIG interface
42B+D
4B+D
Q-SIG
Network
Other Manufacturer
CHAPTER 6
Revision 1.0
Page 287