Version 5.8 299 September 2009
SIP User's Manual 6. Configuration Parameters Reference
Parameter Description
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.
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.
EMS: Blind Transfer Disconnect
Timeout
[BlindTransferDisconnectTimeo
ut]
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
this parameter is set to 0, the REFER message is immediately
sent.
The valid range is 0 to 1,000,000. The default is 0.
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