AudioCodes Mediant 800 MSBG User Manual page 814

Parameter
[TrunkTransferMode_X]
[EnableTransferAcrossTrunkGro
ups]
SIP User's Manual
[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 Hunt Group selected according to the
IP to Tel Routing table is the same Hunt 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
Hunt Groups.
[0] = Disable - ISDN call transfer is only between B-
channels of the same Hunt Group (default).
[1] = Enable - the device performs ISDN transfer between
any two PSTN calls (between any Hunt Group) handled by
the device.
Note: The ISDN transfer also requires that you configure the
parameter TrunkTransferMode_x to 2.
814
Mediant 800 MSBG
Description
Document #: LTRT-12804