AudioCodes Mediant 3000, User Manual

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Version 6.6 801 Mediant 3000
User's Manual 53. Configuration Parameters Reference
Parameter Description
Service (TR 50075) “Courtesy Transfer-Human-No Data”. When the
device receives a SIP REFER message, it performs a blind transfer
by first dialing the DTMF digits (transfer prefix) defined by the
parameter XferPrefixIP2Tel (configured to "*8" for AT&T service),
and then (after 500 msec) the device dials the DTMF of the number
(referred) from the Refer-To header sip:URI userpart.
If the hostpart of the Refer-To sip:URI contains the device's IP
address, and if the Trunk Group selected according to the IP to Tel
Routing table is the same Trunk Group as the original call, then the
device performs the in-band DTMF transfer; otherwise, the device
sends the INVITE according to regular transfer rules.
After completing the in-band transfer, the device waits for the ISDN
Disconnect message. If the Disconnect message is received during
the first 5 seconds, the device sends a SIP NOTIFY with 200 OK
message; otherwise, the device sends a NOTIFY with 4xx message.

[6] = Supports AT&T toll free out-of-band blind transfer for trunks
configured with the 4ESS ISDN protocol. AT&T courtesy transfer is a
supplementary service which enables a user (e.g., user "A") to
transform an established call between it and user "B" into a new call
between users "B" and "C", whereby user "A" does not have a call
established with user "C" prior to call transfer. The device handles
this feature as follows:

IP-to-Tel (user side): When a SIP REFER message is received,
the device initiates a transfer by sending a Facility message to
the PBX.

Tel-to-IP (network side): When a Facility message initiating an
out-of-band blind transfer is received from the PBX, the device
sends a SIP REFER message to the IP side (if the
EnableNetworkISDNTransfer parameter is set to 1).
Note: For configuring trunk transfer mode per trunk, use the parameter
TrunkTransferMode_X.
[TrunkTransferMode_X
]
Determines the trunk transfer mode per trunk (where x is the Trunk ID).
For configuring trunk transfer mode for all trunks and for a description of
the parameter options, refer to the parameter TrunkTransferMode.
[EnableTransferAcross
TrunkGroups] Determines whether the device allows ISDN ECT, RLT or TBCT IP-to-
Tel call transfers between B-channels of different Trunk Groups.

[0] = (Default) Disable - ISDN call transfer is only between B-
channels of the same Trunk Group.

[1] = Enable - the device performs ISDN transfer between any two
PSTN calls (between any Trunk Group) handled by the device.
Note: The ISDN transfer also requires that you configure the parameter
TrunkTransferMode_x to 2.
Web: ISDN Transfer
Capabilities
EMS: Transfer Capability
To ISDN
[ISDNTransferCapabilit
y_x]
Defines the IP-to-ISDN Transfer Capability of the Bearer Capability IE in
ISDN Setup messages, per trunk.

[-1] Not Configured

[0] Audio 3.1 (default)

[1] Speech

[2] Data
Notes:

If this parameter is not configured or is set to -1, Audio 3.1 capability
is used.

The Audio 7 option is currently not supported.