363-206-305
Operations Interfaces
Issue 3 June 2000
6-11
ACO/TST Pushbutton
6
The ACO/TST pushbutton tests all the LEDs on the shelf. All LEDs on the shelf
will be lit while the pushbutton is pressed. If the ACO pushbutton is pressed and
held for more than 2 seconds, the three digits of the software release number are
displayed in the 7-segment FE ID display. If there are any active alarms when the
ACO pushbutton is pressed, the audible office alarms will be silenced and the
ACO LED (part of the pushbutton) on the user panel will be lit.
UPD/INIT Pushbutton
6
This pushbutton, located on the SYSCTL, is used to initialize a controller when it
is first installed in a shelf, to update the system's internal equipment inventory
when signals or equipment are removed from the shelf and when circuit pack
options are changed. The system automatically detects new equipment or signals
added to the shelf. In these cases, it is not necessary to push the UPD/INIT
pushbutton.
The user panel LEDs default to show local system information. The highest active
alarm level is shown by the red LEDs for CR and MJ alarms; yellow LEDs are
shown for MN and power minor (PMN) alarms. A green ACO button/LED is used
to activate the alarm cutoff function. When activated, the LED is on. The green
ACO button also initiates an LED test when the button is depressed and held. A
green PWR ON (PWR ON A and PWR ON B for G4 shelf user panels) LED shows
that the power is on and the terminal is receiving a
−
48 V source. Two yellow
status LEDs show abnormal (ABN) conditions and near-end activity. The yellow
ABN LED is lighted when a temporary condition, potentially affecting
transmission, exists; for example, a manual protection switch or lockout, loopback,
or system test in progress.
The UPDATE/INITIALIZE button addresses the local system and is located on the
SYSCTL circuit pack. The recessed UPDATE/INITIALIZE button serves several
functions during installation and circuit pack replacement. During the first 10
seconds after powering up the SYSCTL circuit pack, depressing this button
initializes the nonvolatile memory with provisioning and state information.
Secondly, after removing a circuit pack or low-speed input, depressing this button
updates the system equipment list to show the slot or signal is now unequipped.
Finally, a series of automatic turnup tests are initiated when the UPDATE/
INITIALIZE and ACO buttons are depressed in a specific sequence.
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