AudioCodes Mediant 3000 User Manual page 800

Parameter
User's Manual
T1 NI2 ISDN [10],
T1 4ESS ISDN [11],
T1 5ESS 9 ISDN [12]
T1 DMS-100 ISDN [14]
T1 RAW CAS [3], T1
CAS [2], E1 CAS [8], E1
RAW CAS [9]
T1 DMS-100 Meridian
ISDN [35]
The valid values of this parameter are described below:

[0] = Not supported (default).

[1] = Supports CAS NFA DMS-100 transfer. When a SIP REFER
message is received, the device performs a Blind Transfer by
executing a CAS Wink, waits for an acknowledged Wink from the
remote side, dials the Refer-to number to the switch, and then
releases the call.
Note: A specific NFA CAS table is required.

[2] = Supports ISDN transfer - Release Link Trunk (RLT) (DMS-100),
Two B Channel Transfer (TBCT) (NI2), Explicit Call Transfer (ECT)
(EURO ISDN), and Path Replacement (QSIG). When a SIP REFER
message is received, the device performs a transfer by sending
Facility messages to the PBX with the necessary information on the
call's legs to be connected. The different ISDN variants use slightly
different methods (using Facility messages) to perform the transfer.
Notes:

For RLT ISDN transfer, the parameter
SendISDNTransferOnConnect must be set to 1.

The parameter SendISDNTransferOnConnect can be used to
define if the TBCT/ECT transfer is performed after receipt of
Alerting or Connect messages. For RLT, the transfer is always
done after receipt of Connect (SendISDNTransferOnConnect is
set to 1).

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:
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 protocols
and implemented according to AT&T Toll Free Transfer Connect
800
Description
TBCT [2] or InBand [5]
RTL [2] or InBand [5]
[1] CAS NFA DMS-100 or [3] CAS Normal
transfer
RTL [2] or InBand [5]
Document #: LTRT-89729
Mediant 3000