Marconi OMS 1200
Technical Product Description
221 02-ZAP 701 25/1 Rev C 2006-08-04
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Table 6-5:Defaults:
System Equipment clock = 1
External Output Sink Priority
Table:
All other sources = none
Equipment Clock Sink Priority
Table:
All sources = none
6.7
Ext/Tributary Clock Selection
Two external timing sources and a third tributary card timing source can be selected in
the External/Trib timing clock priority tables in Section 6.6. The tributary card timing
sources can use either a generic SDH tributary card or a generic PDH tributary card.
Note:
Default: None selected.
6.7.1 OMS1240
Tributary
Selection
One of the ports from the two generic tributary slots, or two core tributary slots may be
chosen as the tributary synchronisation input.
Only configured cards may be selected as timing sources in the priority tables.
Note:
Default: None selected.
6.7.2 OMS1260
Tributary
Selection
One of the ports from the five generic tributary slots in OMS1260-4, or one of the ports
from the seven generic tributary slots in OMS1260-16 may be chosen as the tributary
synchronisation input.
Only configured cards may be selected as timing sources in the priority tables.
Note:
Note: Default: None selected.
6.8
SDH Timing Sources
The SDH timing source quality level is normally determined from the received SSMB
timing markers. It is also possible to choose to ignore the received timing markers and
assign a fixed SSMB value to be used instead.
Note:
Default: Use received SSMB to determine quality level.
6.9
PDH Timing Sources
The SSMB code (and associated implied quality level) for PDH tributary clocks must
be assigned, if timing marker operation is enabled.
Note:
Default: Tributary Clock Quality Levels: 16 (Undefined, SSMB=0000).
6.10
External Timing Input
The input clock frequency and type are configurable from the following options:
