Avaya S8700 Maintenance Manual page 242

LED Interpretation
DS1 CONV (TN574/TN1654) Circuit Pack LEDs
The TN574 and the TN1654 LEDs provide an indication of the state of the DS1
Converter and facilities.
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 (DS1 CONV)
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).
The yellow LED is used to indicate the state of the fiber interface, the fiber
channel, and the DS1 channel in the following manner and order of priority.
Table 6-3. DS1C Yellow Led Flashing States
LED on
0.1 sec
0.5 sec
1 sec
solid on
6-10 Issue 1 May 2002
LED off Condition
0.1 sec Fiber Out-of-Frame or Fiber Loss of Signal
0.5 sec In Frame, fiber channel down. The fiber channel
communicating between the DS1C and the other fiber endpoint
(EI or SNI) is down.
1 sec In Frame, DS1 channel down. The channel between the two
DS1Cs in the DS1C complex is down.
DS1C active. This is the normal state for an active DS1C.
solid off DS1C standby. This is the normal state for a standby DS1C in
critical-reliability systems (duplicated PNC).
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