Pstn Disconnect Detection - Linksys SPA1001 Administrator User Manual

PSTN Line Tab
Field
PSTN Hook Flash Len
PSTN Ring Thru CWT Delay
PSTN Ring Timeout
PSTN Dialing Delay
PSTN Dial Digit Len

PSTN Disconnect Detection

Field
Detect CPC
Detect Polarity Reversal
Detect (PSTN) Long Silence
Min CPC Duration
Detect Disconnect Tone
Linksys IP Phone Administrator Guide
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Description
The length of the hook flash in seconds. During a PSTN-to-VoIP gateway call, the Linksys
ATA 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.
Specify the delay before incoming PSTN calls will ring Line 1 using a Call Waiting
Tone. The default is 3.
Specify the delay after a ring burst before the Gateway decides that the PSTN ring has
ended. The default is 5.
Specify the delay after the PSTN phone line is on-hook before the Gateway dials a PSTN
number. The default is 1.
Specify the on/off time when the Gateway transmits digits 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.
Description
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 2
one triggers the disconnection. For VoIP gateway call, the 1
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 <Long Silence Duration> during a
gateway call
The default is yes.
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. The default is 0.2.
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 <Disconnect Tone>
parameter, which depends on the region of the PSTN service.
The default is yes.
Chapter 5 Linksys ATA Field Reference
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polarity reversal triggers the
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