External Clocking Port Connector Specifications; External Clocking Input Port Specifications; Alarm, Management, And Clocking Cable Specifications And Pinouts; Table 27: External Clocking Input Port Connector Pinouts - Juniper ACX2200 Hardware Manual

External Clocking Port Connector Specifications

External Clocking Input Port Specifications

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Copyright © 2017, Juniper Networks, Inc.
Chapter 12: Alarm, Management, and Clocking Cable Specifications and Pinouts
The external clocking port on the ACX2200 router contains four SMB connectors that
support 10 MHz GPS and 1 pulse-per-second (PPS) signals. These signals can also be
accessed through the External Clocking Input port. These signals are internally isolated
and have surge protection. Use a Molex 50-ohm SMB connector or equivalent (not
provided) to connect to the external clocking ports.
An external clocking input port labeled
allows you to connect external clock signal sources.
The port uses an autosensing RJ-48 connector to support framed T1 or E1 signals. Two
LEDs indicate link activity on the port and function in the same way as the T1/E1 ports.
The clocking information is extracted from the input, but the data is discarded.
Table 27 on page 59 provides the pinout information for the RJ-48 connector for the
external clocking input port.

Table 27: External Clocking Input Port Connector Pinouts

Pin Description
1 EXT_CLKA_RRING_LINE
2 EXT_CLKA_RTIP_LINE
3 Reserved
4 EXT_CLKA_TRING_LINE
5 EXT_CLKA_TTIP_LINE
6 Reserved
7 Reserved
8 Reserved
Connecting ACX2200 Routers to External Clocking Devices on page 82
Clocking Ports on the ACX2200 Router on page 20
EXT REF CLK IN on the front panel of the router
Direction
Input
Input
–
Output
Output
–
–
–
59