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NEAX2000 IVS
2
ISDN System Manual
Page 8 ND-70919 (E), Issue 1.0
CHAPTER 1 GENERAL INFORMATION
System Outline
System Outline of ISDN Terminal
The system is configured with an ISDN Line Circuit (ILC) for the line interface of an ISDN
Terminal and an ISDN Channel Handler (ICH) for Layer 2 protocol processing (LAP-D).
Figure 1-4 and Figure 1-5 show the system outline of the ISDN Terminal.
Figure 1-4 System Outline of ISDN Terminal (for ISDN-PRI)
NOTE 1: The following connections are only available:
• ISDN Terminal to ISDN Terminal Connection
• ISDN Terminal to ISDN Trunk Connection
• ISDN Trunk to ISDN Terminal Connection
• ISDN Terminal to Single Line Telephone Connection
NOTE 2: NT1 equipment must be installed on the premises.
ILC
2D
PBX
23B/30B
D
ILC
ISDN
FP
MP
DTI
DCH
DCH : D Channel Handler
DTI : Digital Trunk Interface
ICH : ISDN Channel Handler
ILC : ISDN Line Circuit
LC : Line Circuit
NT1 : Network Termination One
PLO : Phase Locked Oscillator
PRT : Primary Rate Interface Trunk
TA : Terminal Adapter
TDSW
ICH
CLOCK
SIGNAL
8D
Terminal
(TE)
• Point to Point
Connection
2B × 2
2D
2B × 2
TA
• Point to Multi-point
Connection
Data
Terminal
ISDN Terminal
(TE)
1.5 M/2 M PCM
DIGITAL LINE (23B/30B + D)
NT1 ISDN
(PLO)
LC
SLT
/PRT