Cisco SPA2102 Administration Manual page 212

ATA Voice Field Reference
PSTN Line page (SPA3102)
Cisco Small Business ATA Administration Guide
Detect Disconnect
Tone
(PSTN) Long
Silence Duration
Silence Threshold
If enabled, SPA will disconnect both call legs when it
detects the disconnect tone from the PSTN side during a
gateway call. Disconnect tone is specified in the
parameter, which depends on the region
of the PSTN service.
The default is yes.
This value is minimum length of PSTN silence (or inactivity)
in seconds to trigger a gateway call disconnection if
The default is 30.
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.
The default is medium.
is yes.
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