Avaya B179 User Manual download pdf (Page 25)

Avaya B179 SIP Conference Phone Installation and Administration Guide

The conference phone supports three accounts. The secondary and fallback accounts are

automatically used if the phone fails to register to the main account. If the phone fails to

Main account, Secondary account, and Fallback account

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

rarily 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 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. Avaya B179 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: > 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 rewritten 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 transla-

tion 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

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Avaya B179 User Manual Page 25