Specifications

Reference Guide 2-17
System Installation System Power and Ground Connections
Figure 2-11. Power Connector Block on Front-Loading Chassis with Power Supplies on
Top
If your system will be connected to voice circuits that use E&M or FX ground-start signaling,
connect the system chassis ground to the same chassis ground used by the external PBX or
other CPE. Tying these grounds together will ensure proper signaling operation and
transmission between the two ends of each circuit.
2.5.4 Power Enhanced Chassis with Power Supplies in Front
Figure 2-12 shows the power connector block on the front-loading chassis with power
enhancement on top. Although the power block is oriented vertically on this chassis, it
provides an improved external power connector that requires additinal jumpers to provide
power to user cards that apply voltage to the CPE device.
RGR
+
+
+
-
-
-
COM
V
N
V
A
V
B
O
ptional Telecom Ground
A
C* third wire* ground
-
48VDC Return
-
48 VDC Supply
AC PLUG
48 VDC PSU
(Note: on Optional Telecom Ground Connection:
It may be required when the 48VDC PSU output is
not grounded or when the system is AC powered. It
is only needed for the proper operation of the
Telecom Ground Start and E&M signaling circuits.
For Additional information please refer to Field Alert
Bulletin 108-000001).
-
+
POWER CONNECTIONS