NEC UX5000, Hardware Manual, Page: 145 / 334

Chapter 2 - Blade Installation and Startup
Chapter 2 2 - 59
S
ECTION
2-7
Trunk Blades
2.7.1
Analog Trunk (4COIU) Blade (Figure 2-29)
- P/N 0911072
The 4COIU is used to provide 4 ports for loop/ground start trunks. The blade can accept a 4COIDB to provide
an additional 4 ports (refer to 2.7.2 Analog Trunk (4COIDB) Daughter Board (Figure 2-30) - P/N 0911074 on
page 2-62).
The COIU blade provides:
●
4 analog loop start/ground start trunk circuits
●
1 trunk status LED
●
1 blade status LED
●
4 Caller ID Circuits
●
2 Power Failure Transfer Circuits
●
Connection for COIDB Daughter Board
Figure 2-29: 4COIU BLADE
CN2(COIU)
Analog Trunk
From Central Office
for Interface Circuit.
#1-#4
CN3
SLT I/F for
Power Failure
Transfer
#1-#2
CN1
CN4
Trunk I/F Circuit #4
Daughter Board I/F
(for COIU/082U)
CN5
Common
Control
Circuit
BUSY LED
(Status for Trunk Lines)
ON: Trunk in Use
OFF: Idle
LIVE LED
(Status LED)
Pin Number
Location
8
7
6
5
2
1
CN2(COIDB)
Analog Trunk
From Central Office
for Interface Circuit.
#5-#8
Trunk I/F Circuit #3
Trunk I/F Circuit #2
Trunk I/F Circuit #1
Trunk I/F Circuit #1
Trunk I/F Circuit #2
Trunk I/F Circuit #3
Trunk I/F Circuit #4