Konftel 300IP Installation Manual page 20

SETTINGS
Account 1 and Account 2
Enable account
Account name
User
Registrar
Proxy
Realm
Authentication name The name used for the Realm authentication. This may be the
Password
Registration Interval
On phone: MENU > SETTINGS > ADVANCED > (PIN) > ACCOUNTS (6,2,1).
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 rewrit-
ten from the private IP address space into the address space on the outside (Internet).
NAT rewrites the addresses but leaves the packets themselves untouched. This kind of
translation works fine for many protocols, but causes a lot of trouble for SIP packets that
contain address information in their content (for example an INVITE request from one IP
address to another).
NAT traversal solves this problem, providing a "view from the outside" that makes it pos-
sible 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
It is possible to store account information for future use, but
temporarily disable it.
This is the name displayed on the screen. It can be set according
to company standards.
The account (customer) name.
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)
Shall contain the proxy server used for Internet communication, if
any. Can be left blank.
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 phone will respond to any realm.
If specified, the phone will only respond to the specific realm when
asked for credentials.
same as the user name, but must be filled in.
The password used for the Realm authentication.
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 is still on and connected to the
server. The default value is 1800 seconds.
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