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NEAX2000 IVS
2
ISDN System Manual
Page 4 ND-70919 (E), Issue 1.0
CHAPTER 1 GENERAL INFORMATION
System Outline
SYSTEM OUTLINE
This system can be interfaced with an ISDN with the Primary Rate Interface or the Basic Rate
Interface at the reference point S/T and ISDN Terminal.
System Outline of ISDN-PRI
The system is configured with a 24/30-channel Digital Trunk Interface (DTI) for digital network
interface, D Channel Handler (DCH) for receiving/transmitting D channel signaling data from/to
the ISDN exchange. Since the Main Processor (MP) contains Phase Locked Oscillator (PLO),
the system can be synchronized to the ISDN as a clock receiver office.
Figure 1-1 shows the system outline of ISDN-PRI.
Figure 1-1 System Outline of ISDN-PRI
NOTE 1: NT1 equipment must be installed in the premise.
NOTE 2: The PRT provides a built-in DCH.
PBX
23B/30B
D
SLT
LC
D
term
DLC
FP
MP
DTI
DCH
1.5 M/2 M PCM
DIGITAL LINE (23B/30B + D)
DCH: D Channel Handler
DTI : Digital Trunk Interface
NT1 : Network Termination One
PLO: Phase Locked Oscillator
PRT: Primary Rate Interface Trunk
TDSW
CLOCK
SIGNAL
/PRT
NT1
ISDN
(PLO)