17-77
Cisco ONS 15454 Procedure Guide, R5.0
March 2005
Chapter 17 DLPs A1 to A99
DLP-A70 Set Up Internal Timing
Step 6
If BITS In State is set to OOS, continue with
. If the BITS In State is set to IS, complete the
following information:
•
Coding—Choose the coding used by your BITS reference, either
B8ZS
(binary 8-zero substitution)
or
AMI
(alternate mark inversion).
•
Framing—Choose the framing used by your BITS reference, either
ESF
(Extended Super Frame) or
SF (D4)
(Super Frame).
•
Sync Messaging—Check this check box to enable SSM. SSM is not available if Framing is set to
Super Frame.
•
Admin SSM—If the Sync Messaging check box is not checked, you can choose the SSM
Generation 2 type from the drop-down list.
Step 7
In the BITS Out area, complete the following information, as needed:
•
Facility Type—choose the BITS Out signal type, either
DS1
or
64 Khz
.
•
BITS Out State—If equipment is connected to the node’s BITS output pins on the backplane and
you want to time the equipment from a node reference, set the BITS Out State for BITS-1 and/or
BITS-2 to
IS
, depending on which BITS Out pins are used for the external equipment. If equipment
is not attached to the BITS output pins, set the BITS Out State to
OOS
.
Step 8
If the BITS Out State is set to OOS, continue with
. If BITS Out State is set to IS, complete the
following information:
•
Coding—Choose the coding used by your BITS reference, either
B8ZS
or
AMI
.
•
Framing—Choose the framing used by your BITS reference, either
ESF
or
SF (D4)
.
•
AIS Threshold—If SSM is disabled or Super Frame is used, choose the quality level where a node
sends an AIS from the BITS 1 Out and BITS 2 Out backplane pins. An AIS alarm is raised when the
optical source for the BITS reference falls to or below the SSM quality level defined in this field.
•
LBO—If you are timing an external device connected to the BITS Out pins, choose the distance
between the device and the ONS 15327. Options are:
0-133 ft.
(default),
124-266 ft.
,
267-399 ft.
,
400-533 ft.
, and
534-655 ft.
Line build out (LBO) relates to the BITS cable length.
Step 9
Click
Apply
.
Note
Refer to the
Cisco ONS 15454 Troubleshooting Guide
for timing-related alarms.
Step 10
Return to your originating procedure (NTP).
DLP-A70 Set Up Internal Timing
Purpose
This task sets up internal timing (Stratum 3) for an ONS 15454.
Tools/Equipment
None
Prerequisite Procedures
DLP-A60 Log into CTC, page 17-66
Required/As Needed
As needed (use only if a BITS source is not available)
Onsite/Remote
Onsite or remote
Security Level
Provisioning or higher
Summary of Contents for ONS 15454 Series
Page 28: ...Tables xxviii Cisco ONS 15454 Procedure Guide R5 0 December 2004 ...
Page 44: ...Tasks xliv Cisco ONS 15454 Procedure Guide R5 0 December 2004 ...
Page 53: ...liii Cisco ONS 15454 Procedure Guide R5 0 December 2004 About this Guide Document Conventions ...
Page 55: ...lv Cisco ONS 15454 Procedure Guide R5 0 December 2004 About this Guide Document Conventions ...
Page 850: ...Index IN 22 Cisco ONS 15454 Procedure Guide R5 0 December 2004 description 4 11 remove 18 23 ...