Medias Mediatrix 1204, Reference Manual

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Chapter 6 - Web Interface – Advanced STUN Configuration
100 Mediatrix 1204
SIP Custom NAT Traversal
The Mediatrix 1204 may be used in a private domain that is not directly connected to the IP network. For
instance, this may be the case for ITSP (Internet Telephony Service Provider) clients that have a small private
network. This private network is connected to the public IP network through the NAT (Name Address
Translation) technology.
You can configure the Mediatrix 1204 with the public IP address of the NAT system, which allows to reach the
unit. SIP packets sent by the Mediatrix 1204 contain the NAT address configured as SIP contact. If the NAT
service is not activated, the real IP address of the Mediatrix 1204 is used.
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To set SIP custom NAT traversal parameters:
1. In the SIP Custom NAT Traversal section of the STUN page, enable the custom NAT traversal by
selecting the Enable option in the Custom NAT Traversal Activation choices.
Figure 51: SIP Custom NAT Traversal Section
2. Enter the public IP address of the NAT system in the NAT Custom Public Address variable.
This is the public IP address used as Contact address by outgoing SIP packets crossing a NAT
system.
3. Click Submit if you do not need to set other parameters.
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