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 pac k firmware
changes the mapp ing of the DS1 channels to move the p acket traffic to another
facility. On TN574 DS1 CONV boards, the packet traffic will be moved to ano ther
‘‘Digital Data Compatible’’ fac ility (as indicated on the fiber link administr ation
screen). On TN1654 DS1 CONV boards, the packet traffic will be moved to either
facility A or B if available. This mapp ing is done to keep the packet service
operational at all times as the system con trol links are carried on these pac ket
connections. When packet traffic is moved to another facility, circu it connections
on the new facility are torn down and c ircuit connections on the old (faulty) facility
are re-mapped to the new packet facility.
After firmware initialization, facility A, the first facili ty, is chosen as the default
primary facility for bot h 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 facil ities. There is a yellow, a green,
and a red LED under software and/or fir mware control. There are four Green
LEDs under hardware control that indic ate, for each DS1 facility, whether a
receive signal is present for the D S1 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 sig nal is present, but it does not imp ly that the
signal is using the correc t framing format (ESF or D4) or line coding (ZCS or
B8ZS). See section DS1C-BD for the description of the red, the g reen, 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 ind ication
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 fac ility is
running alarm free. If the facility is d etecting either a red alar m (loss-of-signal or
loss-of-frame), a yellow alarm (remote frame alarm) or a b lue alarm (AIS signal)
then the LED is lit red. See section DS1C-BD for a complete descri ption off all the
LEDs.
The TN1654 DS1 CONV circuit pack supports th e Wideband Switching feat ure.
The TN574 DS1 CONV does not.
DS1 Facility Busyout
Busying out a maintenance ob ject allows service to be disconnected gracefully.
Busyout puts the object out-of-s ervice until the repair proc edures are completed .
DS1 facilities are busied out via the busyout ds1-facility c ommand. When an
attempt is made to busyout the packet facility (or p rimary facility), system will
print a warning messag e indicating that the override op tion must be used to
busyout the packet fac ility. Busying out the packet facility will result in movi ng the
packet traffic to another fac ility and discon necting circuit c onnections on that
new facility.