AudioCodes Media 800 MSBR User Manual

User's Manual 134 Document #: LTRT-12809
Mediant 800 MSBR
NAT Translation Table Parameters
Parameter Description
Index
CLI: index
[NATTranslation_Index]
Defines the table index entry. This table can include up to 32
entries.
Source Interface Name
CLI: SourceIPInterfaceName
[NATTranslation_SourceIPInter
faceName]
Defines the name of the IP interface, as appears in the Multiple
Interface table.
Target IP Address
CLI: TargetIPAddress
[NATTranslation_TargetIPAddr
ess]
Defines the global IP address. This address is set in the SIP
Via and Contact headers as well as in the o= and c= SDP
fields.
Source Start Port
CLI: SourceStartPort
[NATTranslation_SourceStartP
ort]
Defines the optional starting port range (1-65536) of the IP
interface, used as matching criteria for this NAT rule. If not
configured, the match is done on the entire port range. Only IP
addresses and ports of matched source ports will be replaced.
Source End Port
CLI: SourceEndPort
[NATTranslation_SourceEndPo
rt]
Defines the optional ending port range (1-65536) of the IP
interface, used as matching criteria for this NAT rule. If not
configured, the match is done on the entire port range. Only IP
addresses and ports of matched source ports will be replaced.
Target Start Port
CLI: TargetStartPort
[NATTranslation_TargetStartPo
rt]
Defines the optional, starting port range (1-65536) of the global
address. If not configured, the ports are not replaced. Matching
source ports are replaced with the target ports. This address is
set in the SIP Via and Contact headers, as well as in the o=
and c= SDP fields.
Target End Port
CLI: TargetEndPort
[NATTranslation_TargetEndPor
t]
Defines the optional, ending port range (1-65536) of the global
address. If not configured, the ports are not replaced. Matching
source ports are replaced with the target ports. This address is
set in the SIP Via and Contact headers, as well as in the o=
and c= SDP fields.
14.6.2 Remote UA behind NAT
If the remote User Agent with which the device needs to communicate with is located
behind NAT, the device can resolve the problem of activating the RTP/RTCP/T.38 streams
to an invalid IP address / UDP port.
To resolve this NAT traversal issue, the device offers the following features:

First Incoming Packet Mechanism - see 'First Incoming Packet Mechanism' on page
135

RTP No-Op packets according to the avt-rtp-noop draft - see 'No-Op Packets' on page
135
The figure below illustrates a typical network architecture where the remote UA is located
behind NAT:

AudioCodes Media 800 MSBR Specifications

General

Brand	AudioCodes
Model	Media 800 MSBR
Category	Network Router
Language	English