NEC NEAX2000 IVS2 system manual System Outline, Summary

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.

Figure 1-1 System Outline of Q-SIG

PBX PBX

Call

Control

Protocol Control

Data Link Layer

Physical Layer

Q-reference point
Q	Q
Layer 3
DTI	DTI
Layer 2	NOTE
Layer 1

Call

Control

Protocol Control

Data LinkDTI Layer

Physical Layer

NOTE: Conforming to Q921-a (PBX-PBX Interface)

Page 4	NEAX2000 IVS2 Q-SIG System Manual
	ND-70923 (E), Issue 1.0