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Circuit pack LEDs
Issue 1 June 2005 261
Figure 1: TN775 circuit pack LEDs on faceplate
DS1C (TN574/TN1654) circuit pack LEDs
The TN574 and the TN1654 LEDs provide an indication of the state of the DS1 converter and
facilities.
Note:
Note: DS1 converters are used exclusively with a CSS.
TN574 circuit pack LEDs
Seven LEDs provide an indication of the state of the DS1 converter (DS1C-BD) TN574 circuit
pack and the DS1 facilities. The top group has the standard red, green and yellow LEDs. The
red and green LEDs have the traditional meaning, where red indicates an alarm condition, and
green indicates testing in progress. The four green LEDs on the bottom indicate the status of
the DS1 facilities (see following section).
Figure notes:
1.
Alarm LED (Red)
4.
Latch pin
2.
Test LED (Green)
5.
Locking lever
3.
Busy LED (Yellow)