Clocking Ports On The Acx2200 Router; Figure 9: Sample Input Alarm- Reporting Device - Juniper ACX2200 Hardware Manual

ACX2200 Universal Access Router Hardware Guide
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Clocking Ports on the ACX2200 Router

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Figure 9: Sample Input Alarm- Reporting Device

Connecting ACX2200 Routers to an External Alarm-Reporting Device on page 81
Alarm Contact Port on the ACX2200 Router on page 18
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 ACX2200 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:
Timing input when configured as Ordinary Clock (OC) or Boundary Clock (BC)
Timing output when configured as BC
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