AudioCodes Mediant 1000B - Page 457

Version 7.2 457 Mediant 1000B Gateway & E-SBC
User's Manual 20. Coders and Profiles
Parameter Description
Transport Modes on page 189.
 The corresponding global parameter is IsFaxUsed.
CNG Detector Mode
cng-mode
[IpProfile_CNGmode]
Enables the detection of the fax calling tone (CNG) and defines the
detection method.
 [0] Disable = (Default) The originating fax does not detect CNG;
the device passes the CNG signal transparently to the remote
side.
 [1] Relay = The originating fax detects CNG. The device sends
CNG packets to the remote side according to T.38 (if IsFaxUsed
is set to 1) and the fax session is started. A SIP Re-INVITE
message is not sent and the fax session starts by the terminating
fax. This option is useful, for example, when the originating fax is
located behind a firewall that blocks incoming T.38 packets on
ports that have not yet received T.38 packets from the internal
network (i.e., originating fax). To also send a Re-INVITE message
upon detection of a fax CNG tone in this mode, set the parameter
FaxCNGMode to 1.
 [2] Event Only = The originating fax detects CNG and a fax
session is started by the originating fax, using the Re-INVITE
message. Typically, T.38 fax session starts when the preamble
signal is detected by the answering fax. Some SIP devices do not
support the detection of this fax signal on the answering fax and
thus, in these cases, it is possible to configure the device to start
the T.38 fax session when the CNG tone is detected by the
originating fax. However, this mode is not recommended.
Note: The corresponding global parameter is CNGDetectorMode.
Vxx Modem Transport Type
vxx-transport-type
[IpProfile_VxxTransportType]
Defines the modem transport type.
 [-1] = (Not Configured) The settings of the global parameters are
used:

V21ModemTransportType

V22ModemTransportType

V23ModemTransportType

V32ModemTransportType

V34ModemTransportType
 [0] Disable = Transparent.
 [2] Enable Bypass (Default)
 [3] Events Only = Transparent with Events.
For a detailed description of the parameter per modem type, see the
relevant global parameter (listed above).
NSE Mode
nse-mode
[IpProfile_NSEMode]
Enables Cisco's compatible fax and modem bypass mode, Named
Signaling Event (NSE) packets.
 [0] Disable (Default)
 [1] Enable
In NSE bypass mode, the device starts using G.711 A-Law (default)
or G.711-Law, according to the FaxModemBypassCoderType
parameter. The payload type for these G.711 coders is a standard
one (8 for G.711 A-Law and 0 for G.711 -Law). The parameters
defining payload type for the 'old' Bypass mode
FaxBypassPayloadType and ModemBypassPayloadType are not
used with NSE Bypass. The bypass packet interval is configured
according to the FaxModemBypassBasicRtpPacketInterval