Juniper Networks 8 manual Cabling ERX Routers

Cabling ERX Routers

The SRP I/O module has two input ports for external clock sources. These ports provide a way to ensure that the router system clock remains synchronized with the network’s system clock. The primary clock is labeled A; the secondary, redundant clock is labeled B.

Use the connectors appropriate for your locale (European or

North American standard):

European—Two 75-ohm E1 2.048-Mbps inputs with BNC connectors

North American—Two 100-ohm T1 inputs with three pin wire-wrap connectors. Pins are labeled T (tip), G (ground), and R (ring). We recommend using 26-AWG wire minimum.

NOTE: Use shielded cables to connect the external clock sources to the clock source input ports.

Cabling the SRP I/O Module 57