AudioControl VERSION 6.2 manual SIP SAS Parameters, Description, Cut Through Parameters, derTone

	CPE SIP Products
Parameter	Description
Cut Through Parameters
[DigitalCutThrough]	Enables PSTN CAS channels/endpoints to receive incoming IP calls
	even if the B-channels are in off-hook state.
	[0] Disabled (default)
	[1] Enabled
	When enabled, this feature operates as follows:
	1 A Tel-to-IP call is established (connected) by the device for a B-
	channel.
	2 The device receives a SIP BYE (i.e., IP side ends the call) and
	plays a reorder tone to the PSTN side for the duration set by the
	CutThroughTimeForReOrderTone parameter. The device releases
	the call towards the IP side (sends SIP 200 OK).
	3 The PSTN side, for whatever reason, remains off-hook.
	4 If a new IP call is received for this B-channel after the reorder tone
	has ended, the device “cuts through” the channel and connects the
	call immediately (even though the B-channel is in physical off-hook
	state) without playing a ring tone. If an IP call is received while the
	reorder tone is played, then the device rejects the call.
	Notes:
	If this parameter is disabled and the PSTN side remains in off-hook
	state after the IP call ends the call, the device releases the call after
	60 seconds.
	A special CAS table can be used to report call status events
	(Active/Idle) to the PSTN side during Cut Through mode.
[CutThroughTimeForReOr	Defines the duration (in seconds) of the reorder tone played to the
derTone]	PSTN side after the IP call party releases the call, for the Cut Through
	feature. After the tone has ended, incoming call is answered
	immediately if the FXS is off-hook (analog) / PSTN is connected
	(digital).
	The valid values are 0 to 30. The default is 0 (i.e., no reorder tone is
	played).
	For enabling the Cut Through feature, use the DigitalCutThrough
	(CAS channels) or CutThrough (FXS channels) parameter.

1.11.1.3 SIP SAS Parameters

The table below describes the new SIP SAS application parameter for Release 6.2.

Table 1-5: New SIP SAS Parameter for Release 6.2

Parameter	Description
SAS Block Unregistered	Determines whether the device rejects SIP INVITE requests received
Users	from unregistered SAS users. This applies to SAS Normal and
[SASBlockUnRegUsers]	Emergency modes.
	[0] Un-Block =Allow INVITE from unregistered SAS users (default)
	[1] Block = Reject dialog-establishment requests from un-registered
	SAS users

SIP Release Notes 92 Document #: LTRT-26901