NEC NEAX 2400 ICS - Figure 2-1 Outline of NEAX2400 IMS When the DRU Is Used; General

ND-45383 (E) CHAPTER 2
Page 3
Revision CD 1.0
CHAPTER 2 GENERAL INFORMATION FOR DRU
1. GENERAL
This chapter explains the outline of the functions of the DRU, the system components, and loop-back test func-
tions.
2. SYSTEM OUTLINE
2.1 Purpose of the DRU
The DRU is a system which extends and decentralizes the Line Circuits (LC/DLC/ELC), which have so far
been accommodated in the PIM of the NEAX2400 IMS, using the digital line interface. Figure 2-1 shows
the outline of the NEAX2400 IMS when the DRU is used.
Figure 2-1 Outline of NEAX2400 IMS when the DRU is used
1 2 3 RECALL
4
5 6 PNC
7
8 9 CNF
∗
0
#
LINE
/SPD
HOLD TRF
ANS SPKR
D
term
D
term
Max.
23 or 30
D
terms
•
•
•
DRU
NEAX2400 IMS
DRU
1 2
3 RECALL
4 5 6
PNC
7 8 9
CNF
∗
0
#
LINE
/SPD
HOLD TRF
ANS SPKR
Analog PB TEL
1 2
3 RECALL
4 5
6 PNC
7 8
9 CNF
∗
0
#
LINE
/SPD
HOLD TRF
ANS SPKR
Analog PB TEL
•
•
•
Max. 30
Analog PB TELs
Analog PB TEL
D
term
1-Pair Cable
1-Pair Cable
2-Pair Cable
2-Pair Cable