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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 ex-
change. Since the Main Processor (MP) contains Phase Locked Oscillator (PLO), the system can be syn-
chronized to the ISDN as a clock receiver office.
The figure below shows the system outline of ISDN-PRI.
SLT
LC
term
D
DLC
DCH
NOTE 1:
NT1 equipment must be installed in the premise.
NOTE 2:
The PRT provides a built-in DCH.
System Outline of ISDN-PRI
PBX
23B/30B
DTI
/PRT
D
CLOCK
SIGNAL
TDSW
MP
(PLO)
– 6 –
CHAPTER 1 GENERAL INFORMATION
1.5 M/2 M PCM
DIGITAL LINE (23B/30B + D)
NT1
DCH : D Channel Handler
DTI : Digital Trunk Interface
NT1 : Network Termination One
PLO : Phase Locked Oscillator
PRT : Primary Rate Interface Trunk
SYSTEM OUTLINE
ISDN
NWA-008852-001 Rev.5.0
98ch1001.fm
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