AudioCodes Mediant 3000 User Manual

User's Manual 898 Document #: LTRT-89730
Mediant 3000
Parameter Description
Fax Signaling Method
[IsFaxUsed]
Global parameter that defines the SIP signaling method for establishing
and transmitting a fax session when the device detects a fax. You can
also configure this functionality per specific calls, using IP Profiles
(IpProfile_IsFaxUsed). For a detailed description of the parameter and
for configuring this functionality in the IP Profile table, see ''Configuring
IP Profiles'' on page 391.
Note: If this functionality is configured for a specific IP Profile, the
settings of this global parameter is ignored for calls associated with the
IP Profile.
[HandleG711asVBD] Enables the handling of G.711 as a G.711 Voice Band Data (VBD)
coder.
 [0] = (Default) Disable. The device negotiates G.711 as a regular
audio coder and sends an answer only with G.729 coder. For
example, if the device is configured with G.729 and G.711 VBD
coders and it receives an INVITE with an SDP offer containing G.729
and “regular” G.711 coders, it sends an SDP answer containing only
the G.729 coder.
 [1] = Enable. The device assumes that the G.711 coder received in
the INVITE SDP offer is a VBD coder. For example, if the device is
configured with G.729 and G.711 VBD coders and it receives an
INVITE with an SDP offer containing G.729 and “regular” G.711
coders, it sends an SDP answer containing G.729 and G.711 VBD
coders, allowing a subsequent bypass (passthrough) session if
fax/modem signals are detected during the call.
Note: The parameter is applicable only if G.711 VBD coder(s) with
regular G.711 payload types 0 or 8 are configured for the device (using
the CodersGroup parameter).
[FaxVBDBehavior]
Determines the device's fax transport behavior when G.711 VBD coder
is negotiated at call start.
 [0] = (Default) If the device is configured with a VBD coder (see the
CodersGroup parameter) and is negotiated OK at call start, then both
fax and modem signals are sent over RTP using the bypass payload
type (and no mid-call VBD or T.38 Re-INVITEs occur).
 [1] = If the IsFaxUsed parameter is set to 1, the channel opens with
the FaxTransportMode parameter set to 1 (relay). This is required to
detect mid-call fax tones and to send T.38 Re-INVITE messages
upon fax detection. If the remote party supports T.38, the fax is
relayed over T.38.
Notes:
 If VBD coder negotiation fails at call start and if the IsFaxUsed
parameter is set to 1 (or 3), then the channel opens with the
FaxTransportMode parameter set to 1 (relay) t
o allow future detection
of fax tones and sending of T.38 Re-INVITES. In such a scenario, the
FaxVBDBehavior parameter has no effect.
 This feature can be used only if the remote party supports T.38 fax
relay; otherwise, the fax fails.
[NoAudioPayloadType] Defines the payload type of the outgoing SDP offer.
The valid value range is 96 to 127 (dynamic payload type). The default is
0 (i.e. NoAudio is not supported). For example, if set to 120, the following
is added to the INVITE SDP:

AudioCodes Mediant 3000 Specifications

General

Brand	AudioCodes
Model	Mediant 3000
Category	Gateway
Language	English