NEC DSX-160 - Digital Station (ESIU), Analog Station (SLIU), and Analog Line (COIU) Card Leds

Powering Up the System
50 ◆ Installation DSX-80/160 Hardware Manual
Digital Station (ESIU), Analog Station (SLIU), and Analog Line (COIU) Card LEDs
Figure 35: Digital Station (ESIU), Analog Station (SLIU), and Analog Line (COIU) Card LEDs
109 3 0 9 6 - 25
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.