AudioCodes Mediant 600 - Page 712

SIP User's Manual 712 Document #: LTRT-83310
Mediant 600 & Mediant 1000
Parameter Description
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.
[EnableTransferAcrossTrunkGro
ups]
Determines whether the device allows ISDN ECT, RLT or
TBCT IP-to-Tel call transfers between B-channels of different
Trunk Groups.
 [0] = Disable - ISDN call transfer is only between B-
channels of the same Trunk Group (default).
 [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
[ISDNTransferCapability_ID]
Defines the IP-to-ISDN Transfer Capability of the Bearer
Capability IE in ISDN Setup messages. The ID in the ini file
parameter denotes the trunk number, where 0 is the first trunk.
 [-1] Not Configured
 [0] Audio 3.1 = Audio (default).
 [1] Speech = Speech.
 [2] Data = Data.
 Audio 7 = Currently not supported.
Note: If this parameter isn't configured or equals to '-1', Audio
3.1 capability is used.
[TransferCapabilityForDataCalls]
Defines the ISDN Transfer Capability for data calls.