Digital Station (Esiu), Analog Station (Sliu), And Analog Line (Coiu) Card Leds - NEC DSX-160 Hardware Manual

Powering Up the System

Digital Station (ESIU), Analog Station (SLIU), and Analog Line (COIU) Card LEDs

Sync Status (green)
Fast Flash: PCB running, waiting
for sync. Same as having
the mode switch set to stop.
System has an error.
Slow Flash: PCB running, in sync.
Port Activity (yellow)
Off: All ports on PCB idle.
Flash: Ports are busy. The faster
the flash, the more ports
are busy.
Digital Station (ESIU), Analog Station (SLIU), and Analog Line (COIU) Card LEDs
Figure 35:
50 ◆ Installation
DSX-80/160 Hardware Manual