AudioCodes Mediant 4000 SBC User Manual page 996

CHAPTER 60 Configuration Parameters Reference
'CED Transfer Mode'
configure voip > media fax-modem >
ced-transfer-mode
[CEDTransferMode]
V.150.1 Modem over IP
'Profile Number'
[V1501AllocationProfile]
Parameter
- 963 -
Mediant 4000 SBC | User's Manual
Description
■ [0] Initiate T.38 on Preamble =
(Default) The device to which the
called fax is connected initiates a
T.38 session on receiving . Preamble
signal from the fax.
■ [1] Initiate T.38 on CED = The
device to which the called fax is
connected initiates a T.38 session on
receiving a CED answer tone from
the fax. This option can only be used
to relay fax signals, as the device
sends T.38 Re-INVITE on detection
of any fax/modem Answer tone (2100
Hz, amplitude modulated 2100 Hz, or
2100 Hz with phase reversals). The
modem signal fails when using T.38
for fax relay.
Note: The parameters is applicable only
if the IsFaxUsed parameter is set to 1
(T.38 Relay) or 3 (Fax Fallback).
Defines the method for sending
fax/modem CED (answering) tones.
■ [0] Fax Relay or VBD = (Default)
The device transfers the CED tone in
Relay mode and starts the fax
session immediately.
■ [1] Voice Mode or VBD = The
device transfers the CED tone in
either Voice or Bypass mode and
starts the fax session on V21
preamble.
■ [2] RFC 4733 Blocking RTP VBD =
The device transfers the CED tone in
RFC 2833. This is applicable only to
V.150.1 modem relay and fax
bypass.
■ [3] RFC 4733 Along with RTP
VBD = The device transfers the CED
tone in RFC 2833 and bypass, in
parallel. For combined V.150.1
modem relay and fax relay, use this
option.
Defines the V.150.1 profile, which
determines how many DSP channels
support V.150.1.
The value range is 0 to 20. The default is
0.