Panasonic T-SMART DBS-EX23-530, Справочное руководство

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Programming Reference ISDN System Settings
Revised April 2000 DBS-EX23-530 4-5
Parameter Sync Source 2
Description Determines the source of clocking for the second sync source. The
second sync source is used if the first sync source fails. The system
will attempt to switch from the second source back to the first
source based on the value entered under “Network Re-sync Timer”
(page 4-7).
If the second source fails and the first source is not working, the
system will switch to the third source.
In most cases, a system with one ISDN has the 2nd sync source set
to “3.” Systems with two Signs normally have the 2nd sync source
set to “2.” See page 3-5 for a list of typical sync source settings for
single and double-cabinet systems.
One of the three sync sources should be set to “3” (free run). A
free-run setting is needed, so the DBS ISDN can provide its own
clocking if the network clock fails.
(See “1st sync” for an introduction to clock synchronization.)
Notes:
1. The “free run” setting is the only setting that can be entered for
more than one sync source.
2. For changes to this parameter to take effect, the system must be
powered down, then back up again.
Programming FF1 9# 4# 1# 3# (0-3)#
Options 0=None
1=ISDN of the master cabinet (synchronizes clocking with the
public network)
2=ISDN of the slave cabinet (synchronizes clocking with the pub-
lic network)
3=Free run (internal clocking)