Lucent Technologies PacketStar PSAX 20, User Manual

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Chapter 4 Configuring the Basic System
Configuring the Stratum 3–4 Clock Timing
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PacketStar
™
PSAX 20 Access Concentrator User Guide , Issue 1 Release 6.3.0
3 Select the Accuracy field, and press Enter to cycle through the
predefined set of values ( Stratum3 or Stratum4 ).
4 Select the Synchronization Source field, and press Enter to cycle
through the predefined set of values (see Table 4-11).
(display only) Default: None Indicates that the system timing is not
being provided by the line source.
PrimaryLine Indicates that system timing is provided
by the slot and port of the module spec-
ified as the Primary Line Source.
SecondaryLine Indicates that system timing is provided
by the slot and port of the module spec-
ified as the Secondary Line Source.
Accuracy Default: Stratum3 Indicates timing has Stratum3 preci-
sion.
Stratum4 Indicates timing has Stratum4 preci-
sion.
On Reference
Clock Failure
Go To Default: Freerun Indicates that the Stratum 3–4 module
should switch to freerun status if a ref-
erence clock failure occurs.
Holdover Indicates that the Stratum 3–4 module
should switch to holdover status if a ref-
erence clock failure occurs.
Synchroniza-
tion Source Default:
LineTiming
Indicates the clock will be provided
through the slot and port specified in
the
Primary Line Source and Second-
ary Line Source fields.
Freerun Indicates the system is running on its
internal clock.
CompositeClock Indicates the clock will be provided
through an external clock connected to
the front of the primary Stratum 3–4
module.
Table 4-10. Field Values for the Primary Stratum Window
Field Name Mode of Operation Description
Table 4-11. Field Values for the Synchronization Source Field
Value Description
Freerun (default) Indicates the PSAX 20 system is running on its
internal clock.
LineTiming Indicates the clock timing is provided through the
slot and port specified in the
Primary Line Source
and
Secondary Line Source
fields.