DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126
Issue 4
June 1999
Maintenance Object Repair Procedures
9-665DS1 CONV-BD
9
firmware control until the board has established a link to the SPE via the EI or SNI.
Once the link is established, software controls the three LEDs. If the link breaks,
the LEDs are again under firmware control.
The red and green LEDs have the traditional use where red means an alarm
condition and green indicates that maintenance testing is in progress. The red
and green LED is also turned on during circuit pack initialization by firmware.
When the control link to the circuit pack is lost, firmware controls the red LED to
indicate an alarm condition.
The yellow LED under firmware control is used to indicate the state of the
physical Fiber Interface, the Fiber Channel (link to EI or SNI), the DS1 Control
Channel (link to opposite DS1 CONV board) and the SPE communications link in
the following manner and order of priority. (The yellow LED remains on for longer
periods of time as the DS1 CONV Complex becomes closer to being fully
operational.)
1. If the Fiber is Out of Frame or if a Fiber Loss of Signal condition exists, the
yellow LED will flicker at a 5 Hz rate (on for 100 mS, off for 100 mS).
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 DS1 CONVs in the
DS1 CONV Complex, the yellow LED will pulse at a 1/2 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 DS1 CONV circuit pack will have its yellow LED on
continuously, and a standby DS1 CONV circuit pack will have its yellow
LED off. The LED will then be under software control.
The bottom four green LEDs on the TN574 DS1 CONV board are under hardware
control. The four green LEDs indicate, for each DS1 CONV facility, whether a
receive signal is present for the DS1 facility
The next four LEDs on the TN1654 DS1 CONV 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 affect on the board.
