AudioCodes Mediant 1000 User Manual page 1106

Parameter
[TrunkTransferMode_x]
[EnableTransferAcrossTrunk
Groups]
User's Manual

[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.

[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: To configure trunk transfer mode per trunk, use the parameter
TrunkTransferMode_x.
Determines the trunk transfer mode per trunk (where x denotes the
Trunk number). To configure 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.
1106
Mediant 1000B Gateway & E-SBC
Description
Document #: LTRT-27045