AudioCodes Mediant 800B User Manual page 810

Parameter
[TrunkTransferMode_x]
[EnableTransferAcrossTrunk
Groups]
Web: ISDN Transfer
Capabilities
User's Manual

This transfer can be performed between B-channels from
different trunks or Trunk Groups, by using the parameter
EnableTransferAcrossTrunkGroups.

The device initiates the ECT process after receiving a SIP
REFER message only for trunks that are configured to User
side.

[3] = Supports CAS Normal transfer. When a SIP REFER
message is received, the device performs a Blind Transfer by
executing a CAS Wink, dialing the Refer-to number to the
switch, and then releasing the call.

[4] = Supports QSIG Single Step transfer (PRI/BRI):
IP-to-Tel: When a SIP REFER message is received, the device
performs a transfer by sending a Facility message to the PBX,
initiating Single Step transfer. Once a success return result is
received, the transfer is completed.
Tel-to-IP: When a Facility message initiating Single Step transfer
is received from the PBX, a SIP REFER message is sent to the
IP side.

[5] = IP-to-Tel Blind Transfer mode supported for ISDN
(PRI/BRI) protocols and implemented according to AT&T Toll
Free Transfer Connect 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.
Note: For configuring trunk transfer mode per trunk, use the
parameter 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.
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.
Defines the IP-to-ISDN Transfer Capability of the Bearer Capability
IE in ISDN Setup messages, per trunk.
810
Mediant 800B GW & E-SBC
Description
Document #: LTRT-10274