AudioCodes Mediant 800 User Manual page 1339

CHAPTER 72 Configuration Parameters Reference
'Line Transfer Mode'
configure voip > gateway
voice-mail-setting > line-
transfer-mode
[LineTransferMode]
Parameter
Mediant 800 Gateway & E-SBC | User's Manual
Description
The valid value range is 0 to 20000 (i.e., 20 sec).
The default is 2000 (i.e., 2 sec).
Defines the call transfer method used by the
device. The parameter is applicable to the
following:
■ Analog interfaces: FXO call transfer
■ Digital interfaces: E1/T1 CAS call transfer if the
TrunkTransferMode_x parameter is set to 3
(CAS Normal) or 1 (CAS NFA)
The valid values are:
■ [0] None = (Default) IP.
■ [1] Blind = PBX blind transfer:
✔
Analog (FXO): After receiving a SIP
REFER message from the IP side, the
device (FXO) sends a hook-flash to the
PBX, dials the digits (that are received in
the Refer-To header), and then immediately
releases the line (i.e., on-hook). The PBX
performs the transfer internally.
✔
E1/T1 CAS: When a SIP REFER message
is received, the device performs a blind
transfer, by performing a CAS wink, waiting
a user-defined time (configured by the
WaitForDialTime parameter), dialing the
Refer-To number, and then releasing the
call. The PBX performs the transfer
internally.
■ [2] Semi Supervised = PBX semi-supervised
transfer:
✔
Analog (FXO): After receiving a SIP
REFER message from the IP side, the
device sends a hook-flash to the PBX, and
then dials the digits (that are received in the
Refer-To header). If no busy or reorder
tones are detected (within the user-defined
interval set by the WaitForBusyTime
parameter), the device completes the call
transfer by releasing the line. If these tones
are detected, the transfer is cancelled, the
device sends a SIP NOTIFY message with
a failure reason in the NOTIFY body (such
as 486 if busy tone detected), and
generates an additional hook-flash toward
the FXO line to restore connection to the
original call.
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