Pstn Disconnect Detection Section (Spa8800) - Cisco SPA2102-AN - Single Port Router Administration Manual

ATA Voice Field Reference
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Cisco Small Business ATA Administration Guide
PSTN Hook Flash
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PSTN Dial Digit Len Specify the on/off time when the Gateway transmits digits
PSTN Hook Flash
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PSTN Disconnect Detection section (SPA8800)

On the SPA8800, these settings are configured on the Phone pages only.
Detect CPC
Detect Polarity
Reversal
Detect PSTN Long
Silence
The length of the hook flash in seconds. During a PSTN-to-
VoIP gateway call, the ATA device processes the out-of-
band hook flash signal sent from the VoIP peer through a
hook-flash (momentary on-hook signal) on the FXO port.
This allows the VoIP peer to initiate a three-way
conference call and subsequent call transfer. The duration
of the on-hook signal can be configured using this
parameter.
The default is 0.25. The permitted range is limited to 0.02
to 1.6 seconds.
through the Line (FXO) port. The syntax is on-time/off-time,
expressed in seconds with up to two decimal places. The
permitted range is 0.05 to 3.00. The default is . 1 /. 1 .
Default is .25.
CPC is a brief removal of tip-and-ring voltage. If enabled,
the SPA will disconnect both call legs when this signal is
detected during a gateway call.
The default is yes.
If enabled, SPA will disconnect both call legs when this
signal is detected during a gateway call. If it is a PSTN
gateway call, the 1st polarity reversal is ignored and the
nd
2 one triggers the disconnection. For VoIP gateway call,
the 1 st polarity reversal triggers the disconnection.
The default is yes.
If enabled, SPA will disconnect both call legs when the
PSTN side has no voice activity for a duration longer than
the length specified in the PSTN Long Silence Duration
parameter during a gateway call.
The default is yes.
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