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Cisco ONS 15454 Procedure Guide, R5.0
March 2005
Chapter 17 DLPs A1 to A99
DLP-A69 Set Up External or Line Timing
•
Quality of RES—If your timing source supports the reserved S1 byte, set the timing quality here.
(Most timing sources do not use RES.) Qualities are displayed in descending quality order as ranges.
For example, ST3<RES<ST2 means that the timing reference is higher than a Stratum 3 and lower
than a Stratum 2. Refer to the “Security and Timing” chapter of the
Cisco ONS 15454 Reference
Manual
for more information about SSM, including definitions of the SONET timing levels.
•
Revertive—Select this check box if you want the ONS 15454 to revert to a primary reference source
after the conditions that caused it to switch to a secondary timing reference are corrected.
•
Revertive Time—If Revertive is checked, choose the amount of time the ONS 15454 will wait before
reverting to its primary timing source. Five minutes is the default.
Step 3
In the Reference Lists area, complete the following information:
Note
You can define up to three timing references for the node and up to six BITS Out references.
BITS Out references define the timing references used by equipment that can be attached to the
node’s BITS Out pins on the backplane. If you attach equipment to BITS Out pins, you normally
attach it to a node with Line mode because equipment near the external timing reference can be
directly wired to the reference.
•
NE Reference—Allows you to define three timing references (Ref 1, Ref 2, Ref 3). The node uses
Reference 1 unless that reference fails, in which case the node uses Reference 2. If Reference 2 fails,
the node uses Reference 3, which is typically set to Internal Clock. The internal clock is the Stratum
3 clock provided on the TCC/TCC2P. The options displayed depend on the Timing Mode setting.
–
If the Timing Mode is set to External, your options are
BITS1
,
BITS2
, and
Internal Clock
.
–
If the Timing Mode is set to Line, your options are the node’s working OC-N cards and Internal
Clock. Choose the cards/ports that are directly or indirectly connected to the node wired to the
BITS source, that is, the node’s trunk (span) cards. Set Reference 1 to the trunk card that is
closest to the BITS source. For example, if Slot 5 is connected to the node wired to the BITS
source, choose Slot 5 as Reference 1.
–
If the Timing Mode is set to Mixed, both BITS and OC-N cards are available, allowing you to
set a mixture of external BITS and OC-N trunk (span) cards as timing references.
•
BITS-1 Out/BITS-2 Out—Define the timing references for equipment wired to the BITS Out pins
on the backplane. BITS-1 Out and BITS-2 Out are enabled when BITS-1 and BITS-2 facilities are
put in service. If Timing Mode is set to external, choose the OC-N card used to set the timing. If
Timing Mode is set to Line, you can choose an OC-N card or choose NE Reference to have the
BITS-1 Out and/or BITS-2 Out follow the same timing references as the NE.
Step 4
Click the
BITS Facilities
subtab.
Note
The BITS Facilities section sets the parameters for your BITS1 and BITS2 timing references.
Many of these settings are determined by the timing source manufacturer. If equipment is timed
through BITS Out, you can set timing parameters to meet the requirements of the equipment.
Step 5
In the BITS In area, complete the following information:
•
Facility Type—(TCC2P card only.) Choose the BITS signal type supported by your BITS clock,
either
DS1
or
64Khz+8Khz
.
•
BITS In State—If Timing Mode is set to External or Mixed, set the BITS In State for BITS-1 and/or
BITS-2 to
IS
(in service) depending whether one or both BITS input pin pairs on the mechanical
interface card (MIC) are connected to the external timing source. If Timing Mode is set to Line, set
the BITS In State to
OOS
(out of service).
Содержание ONS 15454 Series
Страница 28: ...Tables xxviii Cisco ONS 15454 Procedure Guide R5 0 December 2004 ...
Страница 44: ...Tasks xliv Cisco ONS 15454 Procedure Guide R5 0 December 2004 ...
Страница 53: ...liii Cisco ONS 15454 Procedure Guide R5 0 December 2004 About this Guide Document Conventions ...
Страница 55: ...lv Cisco ONS 15454 Procedure Guide R5 0 December 2004 About this Guide Document Conventions ...
Страница 126: ...4 14 Cisco ONS 15454 Procedure Guide R5 0 December 2004 Chapter 4 Turn Up Node NTP A256 Set Up SNMP ...
Страница 168: ...5 42 Cisco ONS 15454 Procedure Guide R5 0 December 2004 Chapter 5 Turn Up Network NTP A172 Create a Logical Network Map ...
Страница 304: ...10 8 Cisco ONS 15454 Procedure Guide R5 0 December 2004 Chapter 10 Change Node Settings NTP A87 Change SNMP Settings ...
Страница 410: ...16 4 Cisco ONS 15454 Procedure Guide R5 0 December 2004 Chapter 16 Power Down the Node NTP A114 Power Down the Node ...
Страница 510: ...17 100 Cisco ONS 15454 Procedure Guide R5 0 March 2005 Chapter 17 DLPs A1 to A99 DLP A99 Determine Available VLANs ...
Страница 746: ...20 102 Cisco ONS 15454 Procedure Guide R5 0 March 2005 Chapter 20 DLPs A300 to A399 DLP A399 Install a UBIC H EIA ...
Страница 828: ...A 14 Cisco ONS 15454 Procedure Guide R5 0 December 2004 Appendix A CTC Information and Shortcuts Equipment Inventory ...
Страница 850: ...Index IN 22 Cisco ONS 15454 Procedure Guide R5 0 December 2004 description 4 11 remove 18 23 ...