NEC NEAX2000 IVS2 Manuale Utente
NEAX2000
IVS
2
Q-SIG System Manual
Page 4
ND-70923 (E), Issue 1.0
CHAPTER 1 GENERAL INFORMATION
System Outline
SYSTEM OUTLINE
Summary
This feature allows the PBX to provide basic connection service for interfacing with the other PBX
by using Layer 3 protocol which conforms to ETS 300 172. ETS 300 172 is standardized for
private telecommunication network as Inter-exchange signaling protocol for circuit mode basic
services by European Telecommunication Standards Institute (ETSI). The Q-SIG protocol
creates Layer 3 messages between Q reference points expected as conceptual point for inter-
office signalling.
by using Layer 3 protocol which conforms to ETS 300 172. ETS 300 172 is standardized for
private telecommunication network as Inter-exchange signaling protocol for circuit mode basic
services by European Telecommunication Standards Institute (ETSI). The Q-SIG protocol
creates Layer 3 messages between Q reference points expected as conceptual point for inter-
office signalling.
Figure 1-1 System Outline of Q-SIG
PBX
DTI
Data Link
Layer
Layer
Physical
Layer
Layer
Call
Control
Control
Protocol
Control
Control
Q
PBX
DTI
Data Link
Layer
Layer
Physical
Layer
Layer
Call
Control
Control
Protocol
Control
Control
Q
DTI
Q-reference point
Layer 3
Layer 1
NOTE: Conforming to Q921-a (PBX-PBX Interface)
Layer 2