DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126
Issue 4
June 1999
LED Interpretation
7-12DS1 CONV (TN574/TN1654) Circuit Pack LEDs
7
2. If the Fiber Channel is down (DS1 Converter circuit pack/fiber endpoint
communications), the yellow LED will flash at a 1 Hz rate (on for 500 ms,
off for 500 ms).
3. If the DS1 Control Channel is down between the two DS1CONVs in the
DS1CONV Complex, the yellow LED will pulse at a 0.5 Hz rate (on for 1
second, off for 1 second).
4. If the SPE communications link is down, the yellow LED will wink off every
2 seconds for 200 ms (2 seconds on, 200 ms off).
5. If all is well with the Fiber Interface and all communications channels, the
yellow LED will remain on continuously in a Standard Reliability and High
Reliability System configuration. In Critical Reliability systems (duplicated
PNC), an active DS1CONV circuit pack will have its yellow LED on
continuously, and a standby DS1CONV circuit pack will have its yellow
LED off. The LED will then be under software control.
The bottom four green LEDs on the TN574 DS1CONV board are under hardware
control. The four green LEDs indicate, for each DS1CONV facility, whether a
receive signal is present for the DS1 facility
The next four LEDs on the TN1654 DS1CONV board are labeled STATUS LEDs
and are for future use. These LEDs will not be lit.
The bottom four LEDs on the TN1654 board are labeled SPAN LEDs. These LEDs
are under firmware control. If the facility is not administered, then the LED is not
lit. The LED is lit amber if the facility is running alarm free. If the facility is
detecting either a red alarm (loss-of-signal or loss-of-frame), a yellow alarm
(remote frame alarm) or a blue alarm (AIS signal) then the LED is lit red. The
SPAN SELECT Switch on the TN1654 faceplate is for future use. Pushing the
switch will have no effect on the board. See Figure 7-4
for a view of the face plate
on the TN1654 DS1CONV circuit pack
