- RAD Data Communications Modem User's Manual

Front-Panel Operating Instructions
3-12 ASMi-450 Installation and Operation Manual
In Table 5-1, you will find two types of alarms, designated as ON/OFF and ON:
• A message indicating an ON/OFF alarm is displayed only when the alarm
condition is present, and is automatically removed when the condition is
cleared (if the alarm is being displayed, it will disappear only when the
display is refreshed by scrolling).
• A message indicating an ON alarm persists even after the event that caused
the alarm condition is cleared.
If the ASMi-450 operates normally, but an alarm message of the ON type is
displayed, you can clear the event alarm message from the display by the
following procedure:
Step Action Key Display
1 Bring the cursor in the second row, under
CLEAR
CURSOR
2 Press ENTER to clear the event messages in
the alarm buffer
ENTER If no state alarms are present, the second row
should show EMPTY
Normal Front-Panel Indications
During normal operation, all the ASMi-450 front-panel indicators are off.
Ethernet Interface Indications
During normal operation, the LINK indicator must light continuously. The
COLL, TX, and RX light according to LAN traffic conditions.
Fault Indications
If the LOS indicator and/or the TST indicator lights, data transfer is interrupted.
• The TST indicator lights when a test is active. If the test is activated from
the local ASMi-450, you can see the test type by entering the TEST
OPTIONS (Chapter 5). You can disconnect a local or remote loop as
explained in Chapter 5.
• The HDSL LOS indicator lights when a local loss of synchronization alarm
condition is present on the corresponding line.
• When using the Ethernet interface, the rear LINK indicator will turn off if
the Ethernet LAN is not connected, or not operating properly.
If the COLL indicator lights continuously, this indicates that a permanent
state of collision is present on the LAN. This may be caused by
malfunctioning LAN equipment, however it may also occur in case a test
loopback is activated on the ASMi-450. Check and deactivate any test
loopback on the local and remote ASMi-450 units.
Turn-off
For AC-powered ASMi-450 units, set the rear power switch to OFF.
For DC-powered ASMi-450 units, disconnect the power cable.