CHAPTER68 Configuration Parameters Reference
Mediant 1000 Gateway & E-SBC | User's Manual
Parameter Description
[xferPrefix] ■ The number manipulation rules apply to the user
part of the Refer-To and/or Contact URI before it is
sent in the INVITE message.
■ The parameter can be used to apply different
manipulation rules to differentiate the
transferred/forwarded call number from the
originally dialed number.
'Transfer Prefix IP 2 Tel'
xfer-prefix-ip2tel
[XferPrefixIP2Tel]
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
and CAS 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" and the parameter TrunkTransferMode to 5.
'Enable Semi-Attended Transfer'
semi-att-transfer
[EnableSemiAttendedTransfer]
Determines the device behavior when Transfer is
initiated while in Alerting state.
■ [0] Disable = (Default) Send REFER with the
Replaces header.
■ [1] Enable = Send CANCEL, and after a 487
response is received, send REFER without the
Replaces header.
'Blind'
configure voip > gateway
analog keypad-features >
blind-transfer
[KeyBlindTransfer]
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.
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