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)

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NEAX2000 IVS2 Q-SIG System Manual

ND-70923 (E), Issue 1.0

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NEC NEAX2000 IVS2 system manual System Outline, Summary