Cisco ONS 15310-MA SDH, Procedure Manual, Page: 353 / 632

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Cisco ONS 15310-MA SDH Procedure Guide, Release 9.1 and Release 9.2
78-19416-01
Chapter 16 DLPs H1 to H99
•
BITS In Facility Type—Provisions the BITS In facility type (E1).
• BITS In State—If Timing Mode is set to External or Mixed, set the BITS In State for BITS-1 to
unlocked (in service) if the BITS input port is connected to the external timing source. If Timing
Mode is set to Line, set the BITS In State to OOS (out of service).
•
BITS Out Facility Type—Provisions the BITS Out facility type (E1).
• BITS Out State—If equipment is connected to the node’s BITS output pins and you want to time the
equipment from a node reference, set the BITS Out State for BITS-1 to
unlocked , if the BITS Out
connection is used for the external equipment. If equipment is not attached to the BITS output
connector, set the BITS Out State to
OOS .
Step 7
If the state is set to OOS, continue with Step 8 . If the state is set to unlocked, 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.
•
AIS Threshold—If SSM is disabled or Super Frame is used, choose the quality level where a node
sends an alarm indication signal (AIS) from the BITS 1 Out 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 15310-MA SDH. 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 8
Return to your originating procedure (NTP).
DLP-H46 Set Up Internal Timing
Caution
Internal timing is Stratum 3 and not intended for permanent use. All ONS 15310-MA SDH nodes should
be timed to a Stratum 2 or better primary reference source.
Step 1
In node view, click the Provisioning > Timing > General tabs.
Step 2
In the General Timing area, enter the following:
•
Timing Mode—Set to External.
• SSM Message Set—Set to Generation 1.
Purpose This task sets up internal Stratum 3 timing for an ONS 15310-MA SDH.
Tools/Equipment None
Prerequisite Procedures DLP-H29 Log into CTC, page 16-43
Required/As Needed As needed (use only if a BITS source is not available)
Onsite/Remote Onsite or remote
Security Level Provisioning or higher