DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126
Issue 4
June 1999
Maintenance Object Repair Procedures
9-638DS1-FAC (DS1 Facility)
9
When there are alarms on the packet facility, DS1 CONV circuit pack firmware
changes the mapping of the DS1 channels to move the packet traffic to another
facility. On TN574 DS1 CONV boards, the packet traffic will be moved to another
‘‘Digital Data Compatible’’ facility (as indicated on the fiber link administration
screen). On TN1654 DS1 CONV boards, the packet traffic will be moved to either
facility A or B if available. This mapping is done to keep the packet service
operational at all times as the system control links are carried on these packet
connections. When packet traffic is moved to another facility, circuit connections
on the new facility are torn down and circuit connections on the old (faulty) facility
are re-mapped to the new packet facility.
After firmware initialization, facility A, the first facility, is chosen as the default
primary facility for both DS1 CONV boards.
The TN574 DS1 CONV has seven LEDs which provide an indication of the state
of the DS1 CONV circuit pack and the DS1 facilities. There is a yellow, a green,
and a red LED under software and/or firmware control. There are four Green
LEDs under hardware control that indicate, for each DS1 facility, whether a
receive signal is present for the DS1 facility. From top to bottom these green
LEDs correspond to DS1 facilities A, B, C, and D respectively. If one of the four
green LED is on, it indicates a signal is present, but it does not imply that the
signal is using the correct framing format (ESF or D4) or line coding (ZCS or
B8ZS). See section DS1C-BD for the description of the red, the green, and the
yellow LEDs on the DS1 CONV circuit pack.
The TN1654 DS1 CONV board has eleven LEDs on its faceplate. The top three
system standard LEDs (yellow, green and red) are used to provide an indication
of the state of the DS1 CONV board. 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. See section DS1C-BD for a complete description off all the
LEDs.
The TN1654 DS1 CONV circuit pack supports the Wideband Switching feature.
The TN574 DS1 CONV does not.
DS1 Facility Busyout
Busying out a maintenance object allows service to be disconnected gracefully.
Busyout puts the object out-of-service until the repair procedures are completed.
DS1 facilities are busied out via the busyout ds1-facility command. When an
attempt is made to busyout the packet facility (or primary facility), system will
print a warning message indicating that the override option must be used to
busyout the packet facility. Busying out the packet facility will result in moving the
packet traffic to another facility and disconnecting circuit connections on that
new facility.
