Connecting The Router To External Clocking And Timing Devices - Juniper MX10003 Hardware Manual

Connecting the Router to External Clocking and Timing Devices

IN THIS SECTION
Connecting 1-PPS and 10-MHz Timing Devices to the Router | 104
Connecting a Time-of-Day Device to the Router | 105
Connecting a BITS External Clocking Device to the Router | 105
The router supports external clock synchronization for Synchronous Ethernet, and external inputs.
Connecting 1-PPS and 10-MHz Timing Devices to the Router
The router has two 2x1 DIN 1.0/2.3 right angle connectors that support 1-PPS-IN, 1-PPS-OUT, 10-MHz-IN,
and 10-MHz-OUT timing ports.
NOTE: MX10003 can be configured as a timing master or a slave device. If the MX10003 is
configured as a timing master device, the router gets 1-PPS-IN and 10-MHz-IN input (connected
to the ports marked IN) from the timing source and sends 1-PPS-OUT and 10-MHz-OUT to a
slave device. If the MX10003 is configured as a timing slave device, it receives 1-PPS-IN and
10-MHz-IN (connected to ports marked IN) as input from the timing source.
NOTE: Ensure a cable of 3 m or less in length is used for the 10-MHz and 1-PPS connectors.
To connect the DIN cable to the external clocking input port:
1. Connect one end of the DIN cable connectors to the 1-PPS-IN and the 10-MHz-IN ports marked IN
on the router.
If the MX10003 is a timing master device, use the 1-PPS-OUT and the 10-MHz-OUT ports marked
OUT to connect to a slave router or device.
2. Connect the other end of the DIN cable to the 10-MHz or 1-PPS source network equipment.
NOTE: Ensure that the 10-MHz or 1-PPS source network equipment contains a low voltage
complementary metal oxide semiconductor (LVCMOS) of 50 ohms or is compatible with
low-voltage transistor-transistor logic (LVTTL) (3.3v).
104