NEC UX5000 Hardware Manual

2 - 66 Chapter 2
Chapter 2 - Blade Installation and Startup
2.7.2 Analog Trunk (4COIDB) Daughter Board (Figure 2-31) - P/N 0911074
The 4COIDB is used to provide 4 additional ports for loop/ground start trunks. The blade is connected to a
4COIU blade to provide a total of 8 ports for the combined blade (refer to 2.7.1 Analog Trunk (4COIU) Blade
(Figure 2-30) - P/N 0911072 on page 2-63).
This daughter board can also be installed on the Digital/SLT Combination blade (082U). This combined blade
will provide 8 digital extension ports, 2 analog extension ports, and 4 trunk ports.
The analog trunk daughter board provides:
● 4 analog loop start/ground start trunk circuits
● 4 Caller ID circuits
● Connector for COIU or 082U blade
The 4COIDB consumes 4 trunk ports ranging between ports 001-200. The CN2 connector provides
connection to 4 analog trunk ports. The ground start ports are polarity sensitive (tip to tip, ring to ring) - the
loop start trunks are not. The power failure circuits (CN3), however, are not polarity sensitive.
Blade Maximum’s
9.5”
Chassis
19” Chassis
w/CCPU
19” Chassis
w/o CCPU
19” Chassis
x4
System Max.
w/Networking
25 6 2325
! Important !
● When using the COIU/COIDB for ground start trunks, the PBX ground
must
be connected as described on page 1-73 or the trunks will not
function correctly.
● The ground start trunk ports are polarity sensitive. Be careful when
wiring the trunks.
● When connecting the RJ61 cables to the COIU/COIDB, note the
position of the Power Failure connector (CN3). Do not confuse this
connector as the trunk connector (CN2).
● Switching from Loop Start to Ground Start is set in system
programming.

NEC UX5000 Specifications

General

Brand	NEC
Model	UX5000
Category	Telephone
Language	English