Clocking Ports On The Acx1000 And Acx1100 Router; Chassis Components And Descriptions; Figure 10: Sample Input Alarm-Reporting Device - Juniper ACX1000 Hardware Manual

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Clocking Ports on the ACX1000 and ACX1100 Router

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Copyright © 2017, Juniper Networks, Inc.

Figure 10: Sample Input Alarm-Reporting Device

Alarm Contact Port Pinouts for ACX1000 and ACX1100 Routers on page 71
The clocking ports acquire the clock source and synchronize communication over
time-division multiplexing (TDM) interfaces in the router. The clocking ports distribute
a synchronized clock signal throughout the router by locking onto a clock signal originating
from an internal clock source or by connecting to an external clock source.
The reference clock inputs can be T1/E1 line clocks, Ethernet recovered clocks, IEEE
1588v2 recovered clocks, or xDSL NTU-R timing. Externally available reference clocks
are BITS T1/E1 rate clocks, 1 pulse per second (PPS), and 10 MHz. The four SubMiniature
B (SMB) connectors on the front panel of the router connect to external clock signal
sources. The clocking ports provide the synchronized output clocks from any one of the
above reference inputs based on the clock's priority.
Internal clock sources within the ACX1000 and ACX1100 router include:
External building-integrated timing system (BITS) timing port
10-MHz SMB connectors (one input and one output)
1.544-MHz/2.048 MHz T1/E1 (RJ-48) ports for timing input or output
1 PPS SMB connectors (one input and one output)
Time-of-Day (TOD) RS232 port
SyncE support on RJ-45/SFP ports as timing input or output
Packet timing (IEEE 1588v2) includes:
Timing input when configured as Ordinary Clock (OC) or Boundary Clock (BC)
Timing output when configured as BC
External Clocking Ports Specifications on the ACX1000 and ACX1100 Router on page 75
Connecting the ACX1000 or ACX1100 Router to External Clocking Devices on page 98
Chapter 2: Chassis Components and Descriptions
29