Operations Interfaces
Issue 8.0 July 2002
6-15
n A green alarm cutoff/locator (ACO/LOCTR) pushbutton with a built-in LED
activates the alarm cutoff function and lights the LED. The ACO/LOCTR
pushbutton also controls the line locator (LINE LOCTR) displays and LEDs,
showing the shelf where a fault has occurred.
n The yellow abnormal (ABN) LED is lighted when a temporary condition
potentially affecting transmission exists; for example, a CIT-initiated
protection switch or lockout, or loopback.
n The yellow near-end activity (NE ACTY) LED is lighted when any alarm or
status condition exists at the local terminal or local repeater site.
n The yellow far-end activity (FE ACTY) LED is lighted when any alarm or
status condition exists at a remote terminal or remote repeater site. In
Release 6 and later releases, the FE ACTY LED is also lighted when any
alarm or status condition exists at FT-2000 OC-48 Add/Drop-Rings
Terminals and DDM-2000 Multiplexers in the same alarm group within a
subnetwork. (The remote activity reporting parameter must be enabled,
using the SECURITY-Set-Far End Communications CIT-PC
command or in Release 7.2 and later the ENT-CID-SECU TL1 command.)
n The LINE LOCTR consists of two 7-segment displays and two individual
LEDs. (The original version, available in Release 1 only, had one
7-segment display and lacked the individual LEDs.)
The two 7-segment displays normally show the line number when a circuit
pack fails. When the ACO/LOCTR pushbutton is pressed in and held, the
shelf associated with the line containing the failed circuit pack is displayed.
The yellow east (E) and west (W) LEDs complete the number of the line
containing the failed circuit pack. For example, if the failed circuit pack is
associated with high speed line 1E, the right-hand 7-segment display will
show the number "1" and the E LED will be lighted.
n The yellow USE CIT LED is lighted when the CIT must be used to obtain
more detailed information about system status. The USE CIT LED and the
LINE LOCTR display are never lighted at the same time (except during an
LED test).
n The green power on (PWR ON) LED is lighted when the shelf is receiving
−48 V power.
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