Juniper CTP2000 Series Hardware Guide

Figure 26: Clock Spoke Module
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The clock main module accepts an external clock reference and distributes it to the spoke module using
a twisted pair cable. Each nonvoice card receives the clock on the first RJ-45 and sends it to the front
module.
Figure 27: Hub-and-Spoke Setup
Hub module
Spoke module
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The main clock module has two BNC inputs (BITS and TTL), six RJ-45 ports, and one DB-25 port. Each
RJ-45 port can be connected to one spoke module. The spoke module has one ingress RJ-45 port and one
DB-25 interface. (See Figure 25 on page 27, Figure 26 on page 28, and Figure 27 on page 28.)
NOTE: The latest version of the clock main module does not have the BITS connector and no
longer supports a BITS BNC input. If you need a BITS timing reference to or from a CTP2000
node, you can use any of ports te-0/0 through te-0/3 if you have a T1/E1 interface module in
the first slot.
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Juniper CTP2000 Series Specifications

General

Brand	Juniper
Model	CTP2000 Series
Category	Network Hardware
Language	English