CBUQBR
User Manual
80-14004000-01
2–2
The first interface (in the order 1, 2, 3, 4) that synchronises with the
network supplies clock to the system - if this clock source fails the next
interface with a synchronised clock is used. If interface 4 is providing
clock and synchronisation and it is lost, then interface 1 is tried. If no
clocks are in sync then a free running clock is supplied to the system.
2.4 Real Time Clock
A Real time clock function is provided by the operating system on the
CBUQBR. This software based real time clock facility calculates only
hours minutes and seconds. The time and date used is set and
maintained by CBUGSM automatically for all cards in the shelf.
2.5 ALERTS
There are three ALERTs specifically generated by the CBUQBR. These
are output by the CBUQHSM on the Command and Alarms ports,
depending on the settings in the CBUGSM menus.
ALERT LAPD Activity
Sends an ALERT indicating the state of LAPD.
The ALERT message is:
ALERT LAPD Active
or
ALERT LAPD Inactive
as appropriate.
