Konftel 300IP Installation And Administration page 11

SEttINgS
Account name This is the name showed on the display and can be set according
to company standards.
User The account (customer) name.
Registrar Shall contain the IP address or the public name of the SIP server
where the account is registered (e.g. 10.10.1.100 for a local SIP
server or sip.company.net for a public VoIP service provider)
Proxy Shall contain the proxy server used for Internet communication,
if any. Can be left blank.
Realm The protection domain where the SIP authentication (name and
password) is valid. This is usually the same as the registrar. If
left blank, or marked with a "*", the information is taken from
the Registrar field.
Authentication name The name used for the Realm authentication. This may be the
same as the user name, but must be filled in.
Password The password used for the Realm authentication.
Registration Interval This is a request to the SIP server for when the registration
should expire. Konftel 300IP automatically renews the
registration within the time interval if the phone still is on and
connected to the server. The default value is 1800 seconds.
On phone: MENu > SEttINgS > ADvANCED > (PIN) > ACCouNtS (5,2,1).
Nat traversal
NAT (Network Address Translation) is a firewall or router function that operates by
rewriting the IP addresses in the IP headers as packets pass from one interface to the
other. When a packet, for example, is sent from the inside, the source IP address and
port are rewritten from the private IP address space into the address space on the
outside (Internet).
NAT rewrites the addresses but leaves the packages themselves untouched. This kind of
translation works just fine for many protocols, but causes a lot of trouble for SIP pack-
ages that contain address information in its content (for example an INVITE request
from one IP address to another).
NAT traversal is a solution to this problem, providing a "view from the outside" that
makes it possible to replace the IP address in the SIP requests with the address shown
on the other side of the firewall.
Note that in some cases NAT traversal is not necessary. Some public service providers
of IP telephony keep track of the actual IP address used to register a phone, and the
one used in the SIP requests from the same phone, and then replaces the addresses in
the SIP messages.
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STUN STUN (Simple Traversal of UDP through NATs) is a protocol
for assisting devices behind a NAT firewall or router with their
packet routing. STUN is commonly used in applications of
real-time voice, video, messaging, and other interactive IP com-
munications.
The protocol allows applications operating through a NAT to
discover the presence and specific type of NAT, and obtain the
mapped (public) IP address (NAT address) and port number
that the NAT has allocated for the application's User Datagram
Protocol (UDP) connections to remote hosts. The protocol re-
quires assistance from a 3rd-party network server (STUN server).
STUN should be activated if an external SIP server cannot
connect to the Konftel 300IP behind a firewall NAT function and
the SIP server supports STUN. A suitable STUN server is usually
provided by the VoIP service provider.
Note: STUN might also be referred to as Session Traversal
Utilities for NAT.
STUN host The IP address or public name of the STUN server.
Offer ICE ICE (Interactive Connectivity Establishment), is a STUN addition
that provides various techniques to allow SIP-based VoIP devices
to successfully traverse the variety of firewalls that may exist
between the devices. The protocol provides a mechanism for
both endpoints to discover the most optimized path to be used
for the media traffic.
TURN TURN (Traversal Using Relay NAT ) TURN is an extension to the
STUN protocol to facilitate NAT traversal when both endpoints
are behind symmetric NAT. With TURN, media traffic for the ses-
sion will have to go to a relay server. Since relaying is expensive,
in terms of bandwidth that must be provided by the provider,
and also additional delay for the media traffic, TURN is normally
used as the last resort when endpoints cannot communicate
directly.
TURN User User authentication name on the TURN server.
TURN host The IP address or public name of the TURN server.
Password User authentication password on the TURN server.
On phone: MENu > SEttINgS > ADvANCED > (PIN) > NAt tRAvERSAL (5,2,3).
SEttINgS
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