Carrier Access Access Navigator Verify Equipment Status, Set clock1 ds1 n, Set clock2 ds1 n

Maintenance Procedures

Replace Quad T1 Framer Card

Verify Equipment Status

1.Start management session, if not already logged on.

2.Display clock source assignments by entering the following command: show clock

A message similar to the following will appear.

Primary Master Transmit Clock Source: DS1 12

Secondary Master Transmit Clock Source: INTERNAL

3.Set all four DS1 circuits on QF card out of service to prevent alarms with the following command, where <n> is a range of four DS1 numbers such as 9-12:

set ds1 <n> down

Example: set ds1 9-12 down

4.If no DS1s are used as a primary or secondary clock source on the Quad T1 Framer card to be removed, skip to Remove Front Cover on page 16-22.

Temporarily Move Clock Sources (if required)

1.Record original clock source assignments so they can be restored later.

NOTE: In the following two steps, the temporary clock source should be of equal or higher Stratum clock level, such as from a central office switch. In Access Navigators with the GR-303 option, the status ds1 all command will list the status of “switch” type DS1s as “In Service.”

2.Move primary clock source (if any) to a DS1 on a different QF card with the following command, where <n> is the DS1 number:

set clock1 ds1 <n>

Example: set clock1 ds1 25

3.Move secondary clock source (if any) to a DS1 on a different QF card with the following command, where <n> is the DS1 number:

set clock2 ds1 <n>

Example: set clock2 ds1 29

4.Verify clock source settings with the following command, where <n> is the DS1 number: show clock

A message similar to the following will appear.

Primary Master Transmit Clock Source: DS1 12

Secondary Master Transmit Clock Source: INTERNAL

Access Navigator - Release 1.8 August 2003 16-21