Matrix Sparsh VP110 User Manual

274 Matrix SPARSH VP110 User Guide
Network Address Translation (NAT)
Network Address Translation (NAT) is essentially a translation table that maps public IP address and port
combinations to private ones. This reduces the need for a large number of public IP addresses. NAT ensures
security since each outgoing or incoming request must first go through a translation process. But in the VoIP
environment, NAT breaks end-to-end connectivity.
NAT Traversal
NAT traversal is a general term for techniques that establish and maintain IP connections traversing NAT gateways,
typically required for client-to-client networking applications, especially for VoIP deployments. STUN is one of the
NAT traversal techniques supported by IP phones.
STUN (Simple Traversal of UDP over NATs)
STUN is a network protocol, used in NAT traversal for applications of real-time voice, video, messaging, and other
interactive IP communications. The STUN protocol allows applications to operate behind a NAT to discover the
presence of the network address translator, and to obtain the mapped (public) IP address and port number that the
NAT has allocated for the UDP connections to remote parties. The protocol requires assistance from a third-party
network server (STUN server) usually located on public Internet. The IP phone can be configured to act as a STUN
client, to send exploratory STUN messages to the STUN server. The STUN server uses those messages to
determine the public IP address and port used, and then informs the client.
Procedure
NAT traversal and STUN server can be configured using the configuration files or locally.
To configure NAT traversal and STUN server via web user interface:
• Click on Account->Register.
• Select STUN from the NAT list.
ConfigurationFile <MAC>.cfg
ConfigureNATtraver salandSTUN
serverontheIPphone.
Formoreinformation,refer
“AppendixD‐Configuration
Parameters”.
Local WebUserInterface
ConfigureNATtraver salandSTUN
serverontheIPphone.
Navigateto:
http://<phoneIPAddress>/
servlet?p=account‐
register&q=load&acc=0

Matrix Sparsh VP110 Specifications

General

Brand	Matrix
Model	Sparsh VP110
Category	IP Phone
Language	English