Juniper ACX2100 - Clocking Ports on the ACX2000 and the ACX2100 Router

Figure 13: Sample Input Alarm-Reporting Device
SEE ALSO
Alarm Contact Port Pinouts on the ACX2000 and ACX2100 Router | 85
Clocking Ports on the ACX2000 and the ACX2100 Router
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 PPS, and
10 MHz. The four SubMiniature B (SMB) connectors and one RJ-48 port 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 router include:
•
External building-integrated timing system (BITS) timing port
•
10-MHz timing connectors (one input and one output)
•
1.544-MHz/2.048 MHz T1/E1 (RJ-48) ports for timing input or output
•
1 pulse-per-second (PPS) 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:
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