Switch And Status Panel Indicators - Nortel DMS-100 Series Product Manual

2-20 DPP Hardware
The Switch and Status Panel provides switches for changing the operating
condition of the A and B processors, alarm status indicators, and a banana
jack connection to frame ground. The Rover Interface Panel provides a direct
connection for the Rover maintenance terminal and a banana jack connection
to frame ground. The banana jack connections on the Switch and Status
Panel and Rover Interface Panel provide a means for attaching ground straps
used for Electrostatic Discharge (ESD) protection.

Switch and status panel indicators

The system provides lamps on the Switch and Status Panel for quickly
ascertaining overall system operational conditions. Table 2-1 provides the
color scheme and mnemonic identifier of the status and alarm lamps.
Table 2-1
Alarm lamp color scheme and identifiers
Mnemonic
ALM
PRI
ONL
CRIT
MAJ
MIN
The following paragraphs provide a brief description of the status and alarm
lamps listed in Table 2-1.
ALM (Alarm)
Red indicator lamp (ALM) indicates that an alarm is in active status. When
this lamp is active with other indicator lamps (CRIT, MAJ, or MIN), it is used
to determine particular operational status (level of alarm).
PRI (Primary)
Green status lamps (PRI) indicate which unit is in control of the system. In
the PRIMARY state, the active unit is in operational control of the system and
the other unit is in a standby, or ready state. The standby unit is capable of
performing the same functions as the PRIMARY unit, is error free, and is
available to take control of the system in the event of malfunction in the
PRIMARY unit.
297-1001-019 Standard 02.01 April 1997
Color
Red
Green
Yellow
Red
Red
Yellow
Function
Alarm (Active)
PRIME Unit (status)
ONLY Unit (status)
Critical Alarm
Major Alarm
Minor Alarm