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Panasonic Digital Business System - Overview
April 1997
Issue 6
7
Call Path Delay
The maximum call path delay for each speech link is shown below. The times are in micro-
seconds.
Table 8 - Call Path Delay
Power Failure
If installed the batteries inside the CCU will back up the operation of the DBS for a short
time. The precise time will depend upon system size and the volume of call traffic.
Alternatively an external battery may be added to increase the running time in the event of a
power failure.
In addition a number of power fail telephone units (PFUs) can be connected. The CCU will
divert the first few lines to these units if the power and battery backup fails. The number of
PFUs varies according to the CCU used.
Call Path
Max. Delay
Call Path
Max. Delay
PAS > ITS
1000
ITS > PAS
1000
PAS > 1AS
875
1AS > PAS
875