AudioCodes Mediant 500 E-SBC, User Manual

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User's Manual 54. Configuration Parameters Reference
Version 6.8 795 Mediant 500 E-SBC
Parameter Description
EMS: Basic Packet Interval
CLI: modem-bypass-output-gain
[FaxModemBypassBasicRTPPac
ketInterval]
Defines the basic frame size used during fax/modem bypass
sessions.

[0] = (Default) Determined internally

[1] = 5 msec (not recommended)

[2] = 10 msec

[3] = 20 msec
Note: When set to 5 msec (1), the maximum number of
simultaneous channels supported is 120.
EMS: Dynamic Jitter Buffer
Minimal Delay (dB)
CLI: jitter-buffer-minimum-delay
[FaxModemBypasDJBufMinDela
y]
Defines the Jitter Buffer delay (in milliseconds) during fax and
modem bypass session.
The range is 0 to 150 msec. The default is 40.
EMS: Enable Inband Network
Detection
CLI: enable-fax-modem-inband-
network-detection
[EnableFaxModemInbandNetwor
kDetection]
Enables in-band network detection related to fax/modem.

[0] = (Default) Disable.

[1] = Enable. When this parameter is enabled on Bypass and
transparent with events mode (VxxTransportType is set to 2
or 3), a detection of an Answer Tone from the network
triggers a switch to bypass mode in addition to the local
Fax/Modem tone detections. However, only a high bit-rate
coder voice session effectively detects the Answer Tone sent
by a remote endpoint. This can be useful when, for example,
the payload of voice and bypass is the same, allowing the
originator to switch to bypass mode as well.
EMS: NSE Mode
CLI: NSE-mode
[NSEMode]
Global parameter that enables Cisco's compatible fax and
modem bypass mode, Named Signaling Event (NSE) packets.
You can also configure this functionality per specific calls, using
IP Profiles (IpProfile_NSEMode). For a detailed description of
this parameter and for configuring this functionality in the IP
Profile table, see ''Configuring IP Profiles'' on page
304 .
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.
EMS: NSE Payload Type
CLI: NSE-payload-type
[NSEPayloadType]
Defines the NSE payload type for Cisco Bypass compatible
mode.
The valid range is 96-127. The default is 105.
Note: Cisco gateways usually use NSE payload type of 100.
EMS: T38 Use RTP Port
[T38UseRTPPort]
Defines the port (with relation to RTP port) for sending and
receiving T.38 packets.

[0] = (Default) Use the RTP port +2 to send/receive T.38
packets.

[1] = Use the same port as the RTP port to send/receive
T.38 packets.
Notes:

For this parameter to take effect, you must reset the device.

When the device is configured to use V.152 to negotiate
audio and T.38 coders, the UDP port published in SDP for
RTP and for T38 must be different. Therefore, set the
T38UseRTPPort parameter to 0.