SIP User's Manual 376 Document #: LTRT-12801
MP-500 MSBG
6.8.6 Call Transfer Parameters
The call transfer parameters are described in the table below.
Table 6-35: Call Transfer Parameters
Parameter Description
Web/EMS: Enable Transfer
[EnableTransfer]
Determines whether call transfer is enabled.
 [0] Disable = Disable the call transfer service.
 [1] Enable = Enable the call transfer service (using
REFER)(default).
If the transfer service is enabled, the user can activate
Transfer using hook-flash signaling. If this service is enabled,
the remote party performs the call transfer.
Notes:
 To use call transfer, the devices at both ends must support
this option.
 To use call transfer, set the parameter EnableHold to 1.
Web: Transfer Prefix
EMS: Logical Prefix For Transferred
Call
[xferPrefix]
Defines the string that is added as a prefix to the
transferred/forwarded called number when the REFER/3xx
message is received.
Notes:
 The number manipulation rules apply to the user part of
the REFER-TO/Contact URI before it is sent in the INVITE
message.
 This parameter can be used to apply different
manipulation rules to differentiate transferred/forwarded
number from the originally dialed number.
Web: Transfer Prefix IP 2 Tel
[XferPrefixIP2Tel]
Defines the prefix that is added to the destination number
received in the SIP Refer-to header (for IP-to-Tel calls). This
parameter is applicable to FXO Blind Transfer modes
(LineTransferMode = 1, 2 or 3 ).
The valid range is a string of up to 9 characters. The default is
an empty string.
Web/EMS: Enable Semi-Attended
Transfer
[EnableSemiAttendedTransfer]
Determines the device behavior when Transfer is initiated
while in Alerting state.
 [0] Disable = Send REFER with Replaces (default).
 [1] Enable = Send CANCEL, and after a 487 response is
received, send REFER without Replaces.
EMS: Blind Transfer Add Prefix
[KeyBlindTransferAddPrefix]
Determines whether the device adds the Blind Transfer code
(KeyBlindTransfer) to the dialed destination number.
 [0] Disable (default).
 [1] Enable.
Note: This parameter is applicable to FXO and FXS
interfaces.
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