Call Transfer Parameters

Enables the Call Transfer feature.

Note:

Defines the string that is added as a prefix to the transferred/forwarded called number when the REFER/3xx message is received.

Note:

Defines the prefix that is added to the destination number received in the SIP Refer-To header (for IP-to-Tel calls). The parameter is applicable only to FXO blind transfer modes (i.e., LineTransferMode = 1, 2 or 3, and TrunkTransferMode = 1 or 3 for CAS).

The valid range is a string of up to 9 characters. By default, no value is defined.

Note: The parameter is also applicable to ISDN Blind Transfer, according to AT&T Toll Free Transfer Connect Service (TR 50075) “Courtesy Transfer-Human-No Data”. To support this transfer mode, you need to configure the parameter [XferPrefixIP2Tel] to "*8" (without quotation marks) and the parameter [TrunkTransferMode] to "5" (without quotation marks).

Determines the device behavior when Transfer is initiated while in Alerting state.

Defines the keypad sequence to activate blind transfer for established Tel-to-IP calls. The Tel user can perform blind transfer by dialing the KeyBlindTransfer digits, followed by a transferee destination number.

After the KeyBlindTransfer DTMF digits sequence is dialed, the current call is put on hold (using a Re-INVITE message), a dial tone is played to the channel, and then the phone number collection starts.

After the destination phone number is collected, it is sent to the transferee in a SIP REFER request in a Refer-To header. The call is then terminated and a confirmation tone is played to the channel. If the phone number collection fails due to a mismatch, a reorder tone is played to the channel.

Note: For analog interfaces, it is possible to configure whether the KeyBlindTransfer code is added as a prefix to the dialed destination number, by using the parameter KeyBlindTransferAddPrefix.

Determines whether the device adds the Blind Transfer code (defined by the KeyBlindTransfer parameter) to the dialed destination number.

Note: The parameter is applicable only to analog interfaces.

Defines the duration (in milliseconds) for which the device waits for a disconnection from the Tel side after the Blind Transfer Code (KeyBlindTransfer) has been identified. When this timer expires, a SIP REFER message is sent toward the IP side. If the parameter is set to 0, the REFER message is immediately sent.

The valid value range is 0 to 1,000,000. The default is 0.