Help us improve your experience.

Let us know what you think.

Do you have time for a two-minute survey?

 

Connecting the M320 Router to an External Clocking Device

 

The M320 router contains two external clock input (EXTERNAL CLOCK INPUTS) ports on each control board (CB) labeled A or B.

To connect the router to external clocking devices, connect a cable with RJ-45 connectors to each external clock input port:

  1. Attach an electrostatic discharge (ESD) grounding trap on your bare wrist, and connect the strap to one of the ESD points on the chassis.
  2. Plug one end of the RJ-45 cable into the external clock input ports on the front of the CB.
  3. Plug the other end of the RJ-45 cable into the E1 or T1 external clocking device.
  4. Verify that the LEDs for the external clock inputs are lit steadily green.
  5. Repeat the cabling procedures as needed for the other CB.
  6. Configure the port. See the synchronization statement for M Series and T Series in the Junos OS Administration Library.
  7. Issue the show chassis synchronization command to check the status of the port.
    user@host> show chassis synchronization