AudioCodes Mediant 800B MSBR User Manual page 321

User's Manual
Parameter
Web: Remote RTP Base UDP Port
CLI: remote-base-udp-port
[IpProfile_RemoteBaseUDPPort]
Web: CNG Detector Mode
CLI: cng-mode
[IpProfile_CNGmode]
Version 6.8
Notes:

Fax adaptations (for options 2 and 3):

Echo Canceller = On

Silence Compression = Off

Echo Canceller Non-Linear Processor Mode = Off

Dynamic Jitter Buffer Minimum Delay = 40

Dynamic Jitter Buffer Optimization Factor = 13

If the device initiates a fax session using G.711 (option
2 or 3), a 'gpmd' attribute is added to the SDP in the
following format:

For A-law: 'a=gpmd:8 vbd=yes;ecan=on'

For Mu-law: 'a=gpmd:0 vbd=yes;ecan=on'

When this parameter is set to 1, 2, or 3, the parameter
FaxTransportMode is ignored.

When this parameter is set to 0, T.38 might still be
used without the control protocol's involvement. To
completely disable T.38, set FaxTransportMode to a
value other than 1.

For more information on fax transport methods, see
Fax/Modem Transport Modes on page 177.

The corresponding global parameter is IsFaxUsed.
Defines the lower boundary of the UDP port range used
for RTP, RTCP (RTP port + 1) and T.38 (RTP port + 2).
Once this parameter is configured, the device calculates
the UDP port range (lower to upper boundary). For more
information on determining the port range, see Configuring
RTP Base UDP Port on page 194.
The range of possible UDP ports is 6,000 to 65,535. The
default base UDP port is 6000.
Notes:

For this parameter to take effect, a device reset is
required.

If you set this parameter to a value that is not a factor
of 10, the following message is generated: "invalid
local RTP port".

You can also configure a UDP port range per Media
Realm (see Configuring Media Realms on page 259).

The corresponding global parameter is BaseUDPPort.
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).
321
23. Coders and Profiles
Description
Mediant 800B MSBR