GE Industrial Solutions CPS6000-M2 - Manual (Page 13)

CPS6000-M2 Installation Guide H5694720
Issue 8 January 2008 13
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 with jumper J12 on the
chassis and by enabling or disabling dc Offset in the controller
Vo
lt
a
g
e
Battery Backed
(Common in USA)
Ground
(VBUS+)
Ring Return
tied to VBUS+
(Tip wire)
-48Vdc
(VBUS-)
Ring
(Ring wire)
Vol
ta
g
e
Ground Backed
Ground
(VBUS+)
Ring Return
tied to -48Vdc
(Tip wire)
-48Vdc
(VBUS-)
Ring
(Ring wire)
Volt
ag
e
Ground Backed
No dc
Ground
(VBUS+)
Ring Return
tied to VBUS+
(Tip wire)
-48Vdc
(VBUS-)
Ring
(Ring wire)
Ring Signaling Types