User manual

Three bicolor per port:

■

Data set ready (DSR):

■

Green—DSR is detected or ignored

■

Red—DSR expected but not present

■

Data carrier detect (DCD):

■

Green—DCD is detected or ignored

■

Red—DCD expected but not present

■

Resynchronization:

■

Green—Keepalives are being received

■

Red—Data terminal ready (DTR) toggled from low to high (resynchronization pulses

are being sent)

LEDs

■

Per-port packet and byte counters

■

Resynchronization counters:

■

Number of resynchronizations initiated

■

Time of last resynchronization

Instrumentation

(counters)

EIA-530 PIC ■ 41

EIA-530 PIC