AudioCodes Mediant 800 MSBG User Manual page 813

SIP User's Manual
Parameter
Web/EMS: Trunk Transfer Mode
[TrunkTransferMode]
Version 6.2
Determines the trunk transfer method (for all trunks) when a
SIP REFER message is received. The transfer method
depends on the Trunk's PSTN protocol (configured by the
parameter ProtocolType) and is applicable only when one of
these protocols are used:
PSTN Protocol
E1 Euro ISDN [1]
E1 QSIG [21],
T1 QSIG [23]
T1 NI2 ISDN [10],
T1 4ESS ISDN [11],
T1 5ESS 9 ISDN [12]
T1 DMS100 ISDN
[14]
T1 RAW CAS [3], T1
CAS [2], E1 CAS [8],
E1 RAW CAS [9]
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 (PRI/BRI) 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 Hunt 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.
813
12. Configuration Parameters Reference
Description
Transfer Method (Described Below)
ECT [2] or InBand [5]
Single Step Transfer [4], Path
Replacement Transfer [2], or InBand
[5]
TBCT [2] or InBand [5]
RTL [2] or InBand [5]
[1] CAS NFA DMS-100 or [3] CAS
Normal transfer
February 2011