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Figure 31 - Clock Controller primary and secondary tracking
Primary
clocking
source
Secondary
clocking
source
553-2901-200
Standard 11.00
NTD12 Dual-port DTI/PRI card description and installation
primary
REF 1
DDP
PRIMARY
Reference
primary
REF 2
REF 1
secondary
DDP
SECONDARY
Reference
REF 2
secondary
Free run (non-tracking) mode
The clock synchronization of the Meridian 1 or Meridian SL-1 may operate
in free-run mode if:
— no loop is defined as the primary or secondary clock reference,
— the primary and secondary references are disabled, or
— the primary and secondary references are in local (near end) alarm
August 1996
J1
Clock
Controller
J2
0
J3
clock controller back-up
J1
Clock
Controller
J2
1
J3
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