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Matrix SETU ATA211 System Manual
In the absence of this signal, the call will not be considered as disconnected, even when the caller goes
On-hook. This will result in inaccurate billing.
To resolve this, ATA211 supports 'Disconnect Signaling Detection'. When there is an outgoing call through
the FXO port or there is an incoming call on the FXO port, and call gets matured, if the called party
disconnects the call, the disconnect signal will be generated.
Select the appropriate
Disconnect Signaling
Type from the options according to the type supported by
your CO network:
•
None:
Select this when no signaling is available from the CO.
•
Polarity Reversal:
Select this when call disconnection is signaled in the form of Polarity Reversal.
When the call is disconnected by the remote user, the polarity of line gets reversed, the FXO port is
released (free) and caller gets error tone.
•
Open Loop Disconnect:
Select this option when call disconnection is signaled in the form of Open
Loop Disconnect signal. ATA211 will check Open Loop Disconnect signal for the time configured as the
Open Loop Disconnect Timer.
If Open Loop signal is detected for the time less than the Open Loop Disconnect Timer configured, it
will not be considered as a valid Open Loop signal for releasing the port. If Open Loop is detected
continuously at least for the time set in the Open Loop Disconnect Timer, it is considered as a valid
Disconnect signal. After this signal is detected, the call will be released and caller will get error tone.
If you select this option, you must configure the Open Loop Disconnect Timer.
•
Open Loop Disconnect Timer:
If you selected Open Loop Disconnect, you may set the value of
this timer, as required. Default: 500 milliseconds. Valid range: 001 to 999 msec.
Default: None
3.
Disconnect Tone Detection
is used by ATA to release the FXO port, when the remote party goes On-
hook or disconnects the call. The tone detection is applicable for both incoming and outgoing calls made
on/ from the FXO port. Consider this example:
As shown in above the figure, the Extension-X is in an active call with remote party 'Y'.
Now, during the call, when remote party 'Y' goes On-hook, but the PSTN does not send any disconnect
signal as an indication of On-hook, party 'X' will not know this and remain Off-hook, even after party-Y has
gone On-hook.
IP
PSTN
WAN Port
FXS
SETU ATA211
FXO
Calling Party (Y)
Calling Party (X)
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