AudioCodes E-SBC User Manual page 1157

CHAPTER 68 Configuration Parameters Reference
Parameter
'NAT IP Address'
configure voip > sip-
definition general-
settings > nat-ip-
addr
[StaticNatIP]
[NATBindingDefaultTimeout]
[EnableIPAddrTranslation]
Mediant 1000 Gateway & E-SBC | User's Manual
■ [3] NAT by Signaling = The device identifies whether or
not the UA is located behind NAT based on SIP signaling.
The device assumes that if signaling is behind NAT that
the media is also behind NAT, and vice versa.
✔
UA behind NAT: The device sends media according
to option Force NAT (2).
✔
UA not behind NAT: The device sends media
according to option Disable NAT (1).
Note: : This option is applicable only to SBC calls. If the
parameter is configured to this option, Gateway calls use
option Enable NAT Only if Necessary (0), by default.
■ [4] NAT by Signaling Restricted IP = The device
identifies whether or not the UA is located behind NAT
based on SIP signaling. The device assumes that if
signaling is behind NAT that the media is also behind
NAT, and vice versa.
● UA behind NAT: The device sends media only when
the source of the media packets is the signaling IP
address (source of the INVITE).
● UA not behind NAT: The device sends media
according to option Disable NAT (1).
Note: This option is applicable only to SBC calls.
For more information on NAT traversal, see
Packet Mechanism.
Defines the global (public) IP address of the device to enable
static NAT between the device and the Internet. For more
information, see Configuring a Static NAT IP Address for All
Interfaces on page 109.
Note: The parameter is applicable only to the Gateway
application.
The device sends SNMP keep-alive traps periodically - every
9/10 of the time configured by the parameter (in seconds).
Therefore, the parameter is applicable only if you configure
the [SendKeepAliveTrap] parameter to [1].
The parameter is used to allow SNMP communication with
AudioCodes One Voice Operations Center (OVOC)
management platform, located in the WAN, when the device
is located behind NAT. It is needed to keep the NAT pinhole
open for the SNMP messages sent from OVOC to the device.
The valid range is 0 to 2,592,000. The default is 30.
Note: For the parameter to take effect, a device reset is
required.
Enables IP address translation for RTP, RTCP, and T.38
packets.
■ [0] = Disable IP address translation.
■ [1] = (Default) Enable IP address translation.
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