Table of physical ports that could be used as the clock source for other physical ports (i.e. DSL, DS1/DS3, and sonet).

Entries are added to this table automatically by the system software whenever a card is activated for the first time. Ports that can supply clock will be added to this table with the default eligibility being set to FALSE (i.e not eligible to be a clock source). Current port types that will be added to this table are: DS1/E1, DS3/E3, and Sonet). Note that only physical ports are added so for example, a DS3 would be added but not any of the associated DS1 interfaces.

A manager provisions entries in this table to be eligible to be a clock source and the associated weight that is provisioned is used to determine the preference order for the clock source.

A manager which specifies the DEPRECATED zhonePrimaryClockSource overrides entries in this table and will be used as the system clock source as long as the interface is active.