User guide

Account 1 and Account 2

Enable account It is possible to store account information for future use, but

temporarily disable it.

Account name This is the name displayed on the screen. It 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 phone will respond to any realm.

If specied, the phone will only respond to the specic realm when

asked for credentials.

Authentication name The name used for the Realm authentication. This may be the

same as the user name, but must be lled 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 is still on and connected to the

server. The default value is 1800 seconds.

On phone: MENU > SETTINGS > ADVANCED > (PIN) > ACCOUNTS (6,2,1).

Nat traversal

NAT (Network Address Translation) is a rewall 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 ne 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 rewall.

Note that in some cases NAT traversal is not necessary. Some public service providers

SETTINGS