GE Industrial Solutions CPS6000 - Manual (Page 143)

CPS6000 –48V Indoor/Outdoor Power Shelf
Issue 21 January 2008
143
Types of Ringing
QS820 Ringers can be configured to provide one of three types of ringing: Battery Backed,
Ground Backed, and Ground Backed-no dc. Ringing type is selected by selecting dc Offset
polarity and by enabling or disabling dc Offset.
dc Offset polarity is set by the J12 Ringer Chassis jumper or external connection. dc Offset
may be disabled via controller setting if desired.
Volt
ag
e
Battery Backed
(Common in USA)
Ground
(VBUS+)
Ring Return
tied to VBUS+
(Tip wire)
-48Vdc
(VBUS-)
Ring
(Ring wire)
Volt
a
g
e
Ground Backed
Ground
(VBUS+)
Ring Return
tied to -48Vdc
(Tip wire)
-48Vdc
(VBUS-)
Ring
(Ring wire)
Volta
g
e
Ground Backed
No dc
Ground
(VBUS+)
Ring Return
tied to VBUS+
(Tip wire)
-48Vdc
(VBUS-)
Ring
(Ring wire)
Figure 10-1: Ring Signaling Types
Output Voltage and Frequency
Ringer output voltage and frequency settings are controlled by the Controller. See Ringer
specifications for ranges and factory settings.
Fan Power
Ringers provide power, control, and alarm monitoring for Ringer Chassis fans.