Version 7.2 1183 Mediant 800B Gateway & E-SBC
User's Manual 72. Configuration Parameters Reference
Parameter Description
the SIP 'cause' parameter in the Request-URI.
Redirecting Reason >> SIP Response Code
Unknown >> 404
User busy >> 486
No reply >> 408
Deflection >> 487/480
Unconditional >> 302
Others >> 302
If the device receives a Request-URI that includes a 'target'
and 'cause' parameter, the 'target' is mapped to the Redirect
phone number and the 'cause' is mapped to the Redirect
number reason.
[WaitForBusyTime] Defines the time (in msec) that the device waits to detect
busy and/or reorder tones. This feature is used for semi-
supervised PBX call transfers (i.e., the LineTransferMode
parameter is set to 2).
The valid value range is 0 to 20000 (i.e., 20 sec). The default
is 2000 (i.e., 2 sec).
Line Transfer Mode
configure voip > gateway voice-mail-
setting > line-transfer-mode
[LineTransferMode]
Defines the call transfer method used by the device. The
parameter is applicable to FXO call transfer and E1/T1 CAS
call transfer if the TrunkTransferMode_x parameter is set to
3 (CAS Normal) or 1 (CAS NFA).
[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.
E1/T1 CAS: The device performs a CAS wink, waits
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