AudioCodes Mediant 600 User Manual page 775

User's Manual
Parameter
[EarlyAnswerTimeout]
Web/EMS: Trunk
Transfer Mode
[TrunkTransferMode]
Version 6.6
Defines the duration (in seconds) that the device waits for an ISDN
Connect message from the called party (Tel side), started from when it
sends a Setup message. If this timer expires, the call is answered by
sending a SIP 200 OK message (to the IP side).
The valid range is 0 to 2400. The default is 0 (i.e., disabled).
Note: This parameter can be configured per IP Profile.
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 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 (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
775
52. 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
RTL [2] or InBand [5]
Mediant 600 & Mediant 1000