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Configuring the Voice Settings
PSTN (LINE Port)
Cisco SPA232D Administration Guide 144
4
Detect Polarity
Reversal
Choose yes to enable or choose no to disable this feature.
If enabled, the ATA will disconnect both call legs when this
signal is detected during a gateway call. If it is a PSTN
gateway call, the first polarity reversal is ignored and the
second one triggers the disconnection. For VoIP gateway
call, the first polarity reversal triggers the disconnection.
Default setting: yes
Detect PSTN Long
Silence
Choose yes to enable or choose no to disable this feature.
If enabled, the ATA will disconnect both call legs when the
PSTN side has no voice activity for a duration longer than
the length specified in the Long Silence Duration
parameter during a gateway call.
Default setting: no
Detect VoIP Long
Silence
Choose yes to enable or choose no to disable this feature.
If enabled, the ATA will disconnect both call legs when the
VoIP side has no voice activity for a duration longer than
the length specified in the Long Silence Duration
parameter during a gateway call.
Default setting: no
PSTN Long
Silence Duration
This value is minimum length of PSTN silence (or
inactivity) in seconds to trigger a gateway call
disconnection if Detect Long Silence is enabled.
Default setting: 30
VoIP Long Silence
Duration
This value is minimum length of VoIP silence (or inactivity)
in seconds to trigger a gateway call disconnection if
Detect Long Silence is enabled.
Default setting: 30
PSTN Silence
Threshold
This parameter adjusts the sensitivity of PSTN silence
detection. Choose from {very low, low, medium, high, very
high}. The higher the setting, the easier to detect silence
and hence easier to trigger a disconnection.
Default setting: medium
Min CPC Duration Specify the minimum duration of a low tip-and-ring
voltage (below 1V) for the Gateway to recognize it as a
CPC signal or PSTN line removal.
Default setting: 0.2
Field Description