Nortel Networks NN43001-301 manual Clock Controller description and installation

a. Connect the primary reference to J2.

b. If available, connect the secondary reference to J1.

c. Connect the cable between the two clocks to J3 on each controller card.

10 Set the faceplate ENL/DIS switch to ENL.

Note: Verify that the faceplate LED flashes three times to ensure the clock controller self test passed.

11 Enable the clock controller by entering ENL CC x in LD 60.

12 Set the error detection thresholds and clock synchronization controls in LD 73. (Optional with card replacement; required with new installation.)

13 Track on a primary or secondary reference clock, use LD 60. Use the following command:

Nortel Communication Server 1000

ISDN Primary Rate Interface Installation and Commissioning

NN43001-301 02.03 Standard

Release 5.5 7 December 2007

172Clock Controller description and installation

4Set the ENL/DIS toggle switch to DIS (disable).

5Replacing a clock controller, do the following:

•Perform a status check on the clock with the SSCK command in LD 60. The new controller should have the same status.

Note: ERR20 messages can be generated. These can usually be ignored. However, excessive clock switching should be avoided, especially when counters are near the maintenance or out-of-service thresholds. Excessive switching could generate threshold-exceeded messages or cause the PRI to be automatically disabled. Check the counters in LD 60. If necessary, reset the counters using the RCNT command.

a.Set the old card’s faceplate ENL/DIS switch to DIS.

b.Disconnect the cables from the old clock controller card and remove the card from the shelf.

6Adjust the 3PE switches to recognize the clock controller card.

7Set faceplate ENL/DIS switch to DIS.

8Install the clock controller in the selected slot.

9Run and connect cables

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