User's Manual 1142 Document #: LTRT-10532
Mediant 500L Gateway & E-SBC
Parameter Description
To use call transfer, set the parameter EnableHold to 1.
Transfer Prefix
configure voip > gateway dtmf-
supp-service supp-service-settings
> transfer-prefix
[xferPrefix]
Defines the string that is added as a prefix to the
transferred/forwarded called number when the REFER/3xx
message is received.
Note:
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 to FXO blind transfer modes, i.e.,
LineTransferMode = 1, 2 or 3.
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 FXS/FXO interfaces, it is possible to configure
whether the KeyBlindTransfer code is added as a prefix to the
dialed destination number, by using the parameter
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