PLANET VIP-1680 - Manual (Page 75)

FAQ 3: FXO Ringer Voltage Threshold / Ringer Voltage Filter Setting
VIP-Gateway provides ring detector in FXO device avoiding can not answer and always OFF-HOOK
status. This ring detector provides two functions to meet the various PBX’s extension port:
1. FXO ringer voltage threshold
2. FXO ringer voltage filter
FXO Ringer Voltage Threshold
These three settings enable satisfaction of global ringer threshold requirements:
Low : 15V ± 10%
Medium: 21V ± 10%
High : 45V ± 10%
Thresholds are set so that a signal is guaranteed to not be detected below the minimum, and a ringer
signal is guaranteed to be detected above the maximum.
FXO Ringer Voltage Filter
Some vendor’s PBX generates the leakage voltage from extension port.
That will mislead the FXO become Off-hook status.
This function was set to avoiding a leakage voltage signal is detected as ring coming.
FAQ 4: Answer Supervision
This chapter document is designed to help explain and resolve issues of answer supervision from a
switch or PSTN provider that could result in billing for termination calls.
VIP-Gateway provides 2 Types of Answer Supervision:
1. Loop-Start Reverse Battery:
Reverse battery (also called Polarity Reverse) is when the PSTN provider reverses the polarity of the
battery voltage, for both answer supervision and disconnects supervision.
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