3Com 3C10122 - NBX Business Telephone Installation Manual page 49

Each Legacy Link Analog Card has the following lights and connectors:
Status Lights 1 – 16 — All LEDs flash approximately every 10
■
seconds.
On – Handset off-hook (call in progress)
■
Off – Handset on-hook or no handset connected
■
— Power indicator
■
On – Input power input Ok
■
Off – Input power failed
■
System test
■
Flashing – Card is functioning correctly
■
Off – Card has failed
■
Status
■
On – Seek service assistance
■
Off – Operating normally
■
— The power connector is a 6-pin, circular, Mini-DIN type. Power
■
from the external 48V D.C. supply is fed into the card via this
connector to power the handsets through the RJ21x 50-way line
connector.
On – External power ok
■
Off – External power failed
■
Channels — Channel LEDs are normally off, and all LEDs flash
■
approximately every 10 seconds
On – Handset off-hook (for example, a call in progress)
■
Off – Handset on-hook
■
10101 — The 9-pin D-type straight-through connector is used to
■
connect to the RS232 Diagnostic Port. This connector allows engineers
to perform tests on the card or to upgrade the card software.
RJ21x line connector — The RJ21x 50-way line connector is used to
■
connect the analog telephones to the card through the existing punch
block and handset wiring. The pins are paired vertically on the
connector, such that line 1 is connected to pins 1 and 26, line 2 is
connected to pins 2 and 27, and so on.
NBX Cards and Devices 49