Symmetricom ND-SERIES User Manual page 7

AC Versions:
AC models of the ND clock are supplied with an IEC power cord
POE Versions:
Power Over Ethernet (POE) models will require an IEEE 802.3af compliant POE injector, or switch
with +48VDC output on spare pairs of the network cable conductor 4 & 5 with corresponding 48 VDC
returns on pins 7 & 8, or by sharing the data pins and their returns.
[Important Note: the ND clock with an installed POE (Power Over Ethernet) option, will obtain its
power directly from a POE powered source using the spare wires of a standard network cable with
RJ45 connector for input power. The POE source must be a fully compliant IEEE 802.3af PSE
operating at +48VDC. POE sources not IEEE 802.3af compliant might damage the clock and void
the warranty. ]
After application of power, the network clock will go through an internal self-test. Time from
the real-time clock backup will then be displayed until the clock is configured to find an NTP
reference. The colons will flash until an NTP source is found. The flashing colons are a
ND Clocks User Manual - Rev 2.0.1 Sep-08
Insert the standard Cat 5 or Cat 6
o
network cable into the RJ45
connector on the rear of the unit.
Insert the AC power cord into the
o
IEC connector on the rear of the unit.
Insert the standard Cat 5 or Cat 6
o
network cable into the RJ45
connector on the rear of the unit.
The other end of this network cable
o
must be connected to an IEEE
802.3af compliant PSE (Power
Sourcing Equipment) with +48VDC.
This single network cable will carry
o
both data and power. Maximum
distance is 100m/328ft
3
®
Symmetricom , Inc.