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Cisco ONS 15454 SDH Procedure Guide, R7.0
78-17194-01
Chapter 17 DLPs D1 to D99
DLP- D70 Set Up Internal Timing
DLP-D70 Set Up Internal Timing
Caution
Internal timing is SETS timing, and is not intended for permanent use. All ONS 15454 SDH nodes
should be timed to a SETS or better primary reference source.
Note
CTC refers to Timing A and Timing B as BITS-1 and BITS-2. The MIC-C/T/P FMEC connector is
labeled as Timing A and Timing B.
Step 1
In node view, click the
Provisioning > Timing
>
General
tabs.
Step 2
In the General Timing area, enter the following:
•
Timing Mode—Choose
External
.
•
Revertive—Not applicable for internal timing; the default setting (checked) is sufficient.
•
Reversion Time—Not applicable; leave unchanged. For internal timing, the default setting
(5 minutes) is sufficient.
Step 3
In the Reference Lists section, enter the following information:
•
NE Reference
–
Ref1—Set to
Internal Clock
.
–
Ref2—Set to
Internal Clock
.
–
Ref3—Set to
Internal Clock
.
•
BITS-1 Out/BITS-2 Out—Set to
None
.
Step 4
Click
Apply
.
Step 5
Click the
Provisioning > Timing
>
BITS Facilities
tabs.
Step 6
In the BITS Facilities area, enter the following information:
•
E1, 2 MHz—Choose
E1
or
2 MHz
depending on the signal supported in your market. E1 or 2 MHz
are physical signal modes used to transmit the external clock (from a GPS, for example) to BITS.
•
BITS In State—Set BITS-1 and BITS-2 to
locked
.
•
BITS Out State—Set BITS-1 and BITS-2 to
locked
.
•
Coding—Not relevant for internal timing; the default (HDB3) is sufficient.
•
Framing—Not relevant for internal timing; the default (FAS + CAS + CRC) is sufficient.
•
Sync Messaging—The box is checked automatically. SSM is used to deliver clock quality. The
SSMs supported in SDH are G811, STU, G812T, G812L, SETS, DUS (ordered from high quality to
low quality). If you selected 2 MHz, the SSM option is disabled.
Purpose
This task sets up internal timing (SETS) for an ONS 15454 SDH.
Tools/Equipment
None
Prerequisite Procedures
DLP-D60 Log into CTC, page 17-49
Required/As Needed
As needed (use only if a BITS source is not available)
Onsite/Remote
Onsite or remote
Security Level
Provisioning or higher
Содержание ONS 15454 SDH
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Страница 62: ...xxii Cisco ONS 15454 SDH Procedure Guide R7 0 78 17194 01 About this Guide ...
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Страница 66: ...xxvi Cisco ONS 15454 SDH Procedure Guide R7 0 78 17194 01 About this Guide ...
Страница 414: ...16 4 Cisco ONS 15454 SDH Procedure Guide R7 0 78 17194 01 Chapter 16 Power Down the Node NTP D114 Power Down the Node ...
Страница 832: ...A 14 Cisco ONS 15454 SDH Procedure Guide R7 0 78 17194 01 Appendix A CTC Information and Shortcuts Equipment Inventory ...
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