Cabletron Systems KBU 64, Руководство пользователя

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The Front & Rear Panel Descriptions
80-10100000-09 3–13
3.7.2 ISDN and ALARM Indicators
These indicate the state of channels 1 and 2 on the ISDN and are:
Indicator Channel state
B1 IN USE Lights to indicate channel 1 on the ISDN is in use (is
carrying a call).
B1 BACKUP Lights to indicate channel 1 on the ISDN is in use for
backup of your Kilostream channel 1 (USER 1 port is
connected to the ISDN line and not to LINK 1 port).
B2 IN USE Lights to indicate channel 2 on the ISDN is in use (is
carrying a call).
B2 BACKUP Lights to indicate channel 2 on the ISDN is in use for
backup of your Kilostream channel 2 (USER 2 port is
connected to the ISDN line and not to LINK 2 port).
ALARM 1 Lights to indicate that an alarm state, originating from
channel 1, is being output to the rear panel ALARM
port.
ALARM 2 Lights to indicate that an alarm state, originating from
channel 2, is being output to the rear panel ALARM
port.
3.7.3 POWER
Lights to indicate that the KBU 64 power circuits are receiving mains
power and are functioning correctly. Under normal operating conditions,
this indicator should be lit when mains power is connected.
Note that if the KBU 64 is not powered up, the internal pass through
relays will connect the USER port to the LINK port. This will allow
normal operation of the user’s equipment, although the ISDN backup will
not function.
3.7.4 BACKUP Buttons
Two non-latching switches, one for each channel are provided for
manual backup and restoral. When pressed the KBU will attempt a
backup call using the stored ISDN number(s). If pressed when a backup
call is in progress, the KBU will restore the user onto the leased circuit,
and release the ISDN call.
It is not advisable to use the backup button when the KBU is set for
automatic backup or restoral as this causes operational conflict. If