AudioCodes Mediant 4000 SBC User Manual page 781

User's Manual
Parameter
telephony-events-
payload-type-rx
[RFC2833RxPayloadType]
[EnableDetectRemoteMACCha
nge]
RTP Base UDP Port
[BaseUDPport]
[UdpPortSpacing]
no-operation-enable
[NoOpEnable]
[NoOpInterval]
Version 7.0
inbound calls.
The valid range is 96 to 127. The default is 96.
Note: When RFC 2833 payload type negotiation is used (i.e., the
parameter FirstTxDTMFOption is set to 4), this payload type is used
for the received DTMF packets. If negotiation isn't used, this
payload type is used for receive and for transmit.
Determines whether the device changes the RTP packets
according to the MAC address of received RTP packets and
according to Gratuitous Address Resolution Protocol (GARP)
messages.

[0] = Nothing is changed.

[1] = If the device receives RTP packets with a different source
MAC address (than the MAC address of the transmitted RTP
packets), then it sends RTP packets to this MAC address and
removes this IP entry from the device's ARP cache table.

[2] = (Default) The device uses the received GARP packets to
change the MAC address of the transmitted RTP packets.

[3] = Options 1 and 2 are used.
Notes:

For the parameter to take effect, a device reset is required.

If the device is located in a network subnet which is connected
to other gateways using a router that uses Virtual Router
Redundancy Protocol (VRRP) for redundancy, then set the
parameter to 0 or 2.
Global parameter that defines the lower boundary of the UDP port
used for RTP, RTCP (RTP port + 1) and T.38 (RTP port + 2). For
more information on configuring the UDP port range, see
''Configuring RTP Base UDP Port'' on page 195.
The range of possible UDP ports is 6,000 to 65,535. The default
base UDP port is 6000.
Note: For the parameter to take effect, a device reset is required.
Defines the UDP port spacing within the configured port range.

[5] (default)

[10]
Notes:

A device reset is required for the parameter to take effect.

For more information on configuring the UDP port range, see
Configuring RTP Base UDP Port on page 195.
Enables the transmission of RTP or T.38 No-Op packets.

[0] = Disable (default)

[1] = Enable
This mechanism ensures that the NAT binding remains open during
RTP or T.38 silence periods.
Defines the time interval in which RTP or T.38 No-Op packets are
sent in the case of silence (no RTP/T.38 traffic) when No-Op packet
transmission is enabled.
The valid range is 20 to 65,000 msec. The default is 10,000.
Note: To enable No-Op packet transmission, use the NoOpEnable
781
51. Configuration Parameters Reference
Description
Mediant 4000 SBC