Types Of Ringing - ABB CPS6000 Product Manual

• Continue to operate normally from settings stored in their non-volatile memory
• When two Ringers are installed in a Ringer Chassis, they continue to provide 1 + 1 redundant (duplex) operation

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.
Ground
(VBUS-)
-48Vdc
(VBUS-)
Ring
Ground
(VBUS-)
-48Vdc
(VBUS-)
Ring Return
tied to –48Vdc
(Tip wire)
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Ring Return tied to
VBUS+ (Tip wire)
Ground
(VBUS-)
tied to VBUS+
-48Vdc
Ring
(Ring wire)
Figure 10-1: Ring Signaling Types
Ring Return
(Tip wire)
Ring
(Ring wire)