Analog Trunk (4Coiu-S) Pcb (Figure 2-11); Led Indications - NEC Aspire S Manual

Section 2: PCB Installation and Startup

Analog Trunk (4COIU-S) PCB (Figure 2-11)

The Analog Trunk (COIU-S) PCB provides:
● 4 analog loop start line/trunk circuits - no ground start is provided
● 4 trunk status LEDs
● 4 Caller ID Circuits
● 1 Power Failure Transfer Circuit
● 1 PCB status LED
The CN5 and CN7 connectors each provide connection to 2 analog trunk ports, which are polarity sensitive
(tip to tip, ring to ring). The power failure circuit, however, is not polarity sensitive. A maximum of 2
4COIUs per system is allowed.

LED Indications

LD5
(PCB Status)
LD1 - LD4
2-24 ◆ Section 2: PCB Installation and Startup
LED Function
Indicates the status of
the PCB.
Indicates the status of
the lines.
LED Status
Green On Initializing
Green Flashing Initialization problem
(slow flash) occurred during self-check.
Green Flashing Operating normally
(100ms On/Off)
Green Off Downloading
Red On Line in use
Red Off Line idle
Operation Status
Aspire S Hardware Manual