Alcatel-Lucent 9500 MXC User Manual page 665

Auto Insertion of AIS or PRBS on Tribs
3DB 23063 ADAA - Rev 004 July 2007
• Similarly, if a box is ticked but no traffic is to be carried, an alarm is
displayed: Trib (n) LOS.
• Incorrect / incompatible trib settings
Trib line interface settings incorrect, or line levels incompatible. While no
alarm activates for an incorrect setting, its effect may result in line levels being
too low (LOS alarm), or too high, resulting in a high BER:
• DAC 16x and DAC 4x. Impedance options must be set correctly for an E1
selection. Encoding and line length must be set for a DS1 selection.
• Line levels to/from connected equipment must be compatible. While not
usually a problem for PDH connections, it is not uncommon on optical tribs.
• ATPC settings
Ensure ATPC settings are correct, specifically that the target fade margin
allows adequate headroom for local Tx power, while ensuring an adequate
fade margin. Refer to Volume IV, ATPC Guidelines on page 7-20, Volume IV,
for set up information.
• ATPC must not be enabled for RAC 40 XPIC configurations.
ATPC must not be enabled where, with the remote-end Tx muted, the RSL
indicates the presence of interfering signals (RSL should be at or below
threshold with no interferer present).
There is no alarm action to indicate an incorrect/illogical set up.
• Incorrect plug-in specific configuration
This comment applies more to the highly configurable plug-ins, such as DAC
ES, DAC 155oM, and AUX. The flexibility of setup options means more care
is needed in their configuration.
• Configuration Locked
In the unlikely event a 9500 MXC device does not respond to normal CT
commands the reset options include:
• Power recycle: remove power to the radio off, pause for 10 seconds, and
power-on.
• Software reset. Refer to Software Management, Volume IV, Chapter 13.
Refer to Auto Insertion of AIS or PRBS on Tribs on page 15-59, Volume IV,
Chapter 15.
9500 MXC User Manual
Vol. V-2-9