2.7.1.1 Led Indications - NEC UX5000 Hardware Manual

Chapter 2 - PCB Installation and Startup
The 4COIU consumes 4 trunk ports ranging between ports 001-200. The CN2 connector provides connection
to 4 analog trunk ports, which are polarity sensitive (tip to tip, ring to ring). The power failure circuits
(CN3), however, are not polarity sensitive.

2.7.1.1 LED Indications

Live LED
Flashing
(1 second)
Flashing
(100 ms)
2 - 54
●
When using the COIU-LG1 PCB for ground start trunks, the PBX
ground must be connected as described on page 1-55 or the trunks will
not function correctly.
●
The trunk ports are polarity sensitive. Be careful when wiring the trunks.
●
When connecting the RJ61 cables to the COIU PCB, 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.
LED Indication
Busy LED
(green) (red)
On On
On
Flashing
(1 second)
On
Off
Off On
Off
Flashing
(100 ms)
! Important !
Operation Status
PCB Initializing
PCB assignment refused (system
capacity exceeded or software
version incorrect)
Trouble found during self-
diagnostics routine.
Normal Operation
Blocked PCB
Downloading firmware
Operation Status
At least 1 channel busy
All channels idle
At least 1 channel busy
All channels idle
Chapter 2