Omm Module Clock Source Settings; Table 136. Detailed Clock Source Options - ADTRAN OPTI-6100 Installation Manual

OMM Module Clock Source Settings

Digital circuits require a clock source for signal timing in order to operate. This configuration
is part of the provisioning of the OMM modules. This section details the procedures for setting
the clock source. There are other settings in this menu item group, but generally the default
values are accepted. Clock settings made on HS1 are copied to HS2.
To provision OMM module clock settings, complete the following steps:
1. From the Provisioning menu of the module in HS1, select
2. From the Clocks menu, select
There are five choices under this option. The engineering documents for the system
should specify the clock source.
Option
Receive Fiber
Free Run
EXT DS1 SF or ESF
EXT DS1 ESF with Sync Messages
Trib Module
3. From the Clock Source menu, select the clock source, and press
4. Press to return to the
E
SC
5. If this system is to export timing through the backplane to other systems, select
from the Clocks menu, and press
6. From the Clock Out menu, select
61184500L1-5L
Clock Source
Table 136

Table 136. Detailed Clock Source Options

Description
This uses the timing on the optical circuit feeding the
chassis for the clock source.
This uses the internal clock on the OMM module for the
clock source (Source
This uses an external clock source, such as a BITS clock,
wired to the pins on the back of the chassis.
This uses an external SONET clock source, such as a BITS
clock, wired to the pins on the back of the chassis.
This uses timing from one or two signals on one of the
tributary modules as a clock source.
menu.
Clock
E
NTER
Enable
Clocks
, and press .
E
NTER
explains each clock source further.
±
20 ppm).
.
, and press .
E
NTER
OMM Module Installation and Turn-Up
, and press .
E
NTER
.
E
NTER
Clock Out
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