Version 7.2 1115 Mediant 500L Gateway & E-SBC
User's Manual 69. Configuration Parameters Reference
Parameter Description
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:
The parameter is applicable only to the
Gateway application.
Cisco gateways usually use NSE payload type
of 100.
configure voip > sip-definition settings > 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.
Note:
For the 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.
T.38 Max Datagram Size
configure voip > sip-definition settings > t38-mx-
datagram-sz
[T38MaxDatagramSize]
Defines the maximum size of a T.38 datagram
that the device can receive. This value is included
in the outgoing SDP when T.38 is used.
The valid range is 120 to 600. The default is 560.
T38 Fax Max Buffer
configure voip > sip-definition settings > t38-fax-
mx-buff
[T38FaxMaxBufferSize]
Defines the maximum size (in bytes) of the
device's T.38 buffer. This value is included in the
outgoing SDP when T.38 is used for fax relay
over IP.
The valid range is 500 to 3000. The default is
3000.
Detect Fax on Answer Tone
det-fax-on-ans-tone
[DetFaxOnAnswerTone]
Determines when the device initiates a T.38
session for fax transmission.
[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
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