Chapter 2: PTP 820G Hardware Description
Synchronization Interface
phn-3967_005v000
Page 2-13
Synchronization Interface
PTP 820G includes an RJ-45 synchronization interface for T3 clock input and T4 clock output. The
interface is labeled SYNC.
Synchronization Interface LEDs
The synchronization interface contains two LEDs, one on the upper left of the interface and one on
the upper right of the interface, as follows:
•
T3 Status LED
–
Located on the upper left of the interface. Indicates the status of T3 input clock,
as follows:
o
Off
–
There is no T3 input clock, or the input is illegal.
o
Green
–
There is legal T3 input clock.
•
T4 Status LED
–
Located on the upper right of the interface. Indicates the status of T4 output
clock, as follows:
o
Off
–
T4 output clock is not available.
o
Green
–
T4 output clock is available.
o
Blinking Green
–
The clock unit is in a holdover state.
Figure 9 Sync Interface LEDs
Synchronization Interface Pin-Outs
Table 5 Synchronization Interface Pin-Out Diagram
RJ45
Pin no.
Description
1
T3_IN_N
2
T3_IN_P