Using A Trunk Module Clock Source; Configuring Trunk Ports As Eligible Clock Sources - Lucent Technologies Stinger MRT 19 Getting Started Manual

Source: line 1 Available*
Source: line 2 Available*
Source: T1 framer Available*

Using a trunk module clock source

The following commands cause the system to first attempt to use a trunk port as its
clock source, and to use the built-in clock only if it finds no ports that are eligible
clock sources:
admin> read system
SYSTEM read
admin> set system-8k-clock = lim-or-trunk-module
admin> write
SYSTEM written

Configuring trunk ports as eligible clock sources

The DS3-ATM and OC3-ATM profiles support Clock-Source and Clock-Priority
parameters for specifying whether the port can be used to source the ATM network
clock and use it as the master clock for the unit. Each of the trunk ports can be
configured as eligible or ineligible for this use, and can be assigned a high, middle, or
low priority for being elected as the clock source. Following are the relevant
parameters, shown with default settings:
[in DS3-ATM/{ any-shelf any-slot 0 }:line-config]
clock-source = not-eligible
clock-priority = middle-priority
[in OC3-ATM/{ any-shelf any-slot 0 }:line-config]
clock-source = not-eligible
clock-priority = middle-priority
Parameter
clock-source
clock-priority
If more than one line is eligible to be the clock source, the system chooses the one
with the highest priority, as specified by the Clock-Priority setting. If multiple sources
of equal priority are present, the system selects the first valid clock source. (A clock
source is valid if the Clock-Source parameter is set to eligible and the DS3 or OC
interface is synchronized.)
Once it has selected a clock source, the system uses that source until the source
becomes unavailable or a higher-priority source becomes available. If no eligible
external sources exist, the system uses an internal clock.
Stinger® MRT Getting Started Guide
Configuring Administrative Access, System Timing, and Startup Settings
priority: 2
priority: 1
priority: 3
Setting
Enable/disable obtaining the system clock signal from the
port. By default, ports are not eligible clock sources.
Priority of the interface as the system's clock source (high,
middle, or low priority). Once the Stinger MRT unit chooses
a clock source, it uses that source until the interface
becomes unavailable or a higher-priority source becomes
available.
Configuring system clocking (optional)
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