User's Manual

Avaya B179 SIP Conference Phone Installation and Administration Guide

Advanced

Enable SIP Replaces Default is Yes. Setting this option to No, will instruct the PBX not to

use the SIP replace header. Some PBXes try to take over the bridging

functionality from Avaya B179 using this command, which causes the

calls to interrupt.

Enable Blind Transfer Default is Yes. Setting this option to No, will disable the transfer func-

tion (

> TRANSFER) during a call. This may be used if the PBX does not

support blind transfer.

Allow contact rewrite Default is Yes. When enabled, the B179 will store the IP address from

the response of the register request. If a change is detected, the

phone will unregister the current sip URI (contact), and update the sip

URI with the new address.

Send media ‘inactive’ Default is No. Must be set to Yes in a CS1000 server environment.

instead of ‘sendonly’

on hold

Outbound proxy The IP address of the outbound proxy server.

Conference server The IP address of the conference server that is currently in use.

Accept-Language header

value Indicates the preferred languages for reason phrases, session

descriptions, or status responses carried as message bodies in the SIP

response.

Transport

The transport setting only concerns the protocol to be used for SIP messages between the

devices involved. These settings do not include the media (the actual call). The settings on the

Media tab should be set accordingly.

Note that if you choose to use a secure connection, both units must support it. Otherwise

they cannot negotiate a connection. If an incoming call demands a secure TLS or SIPS connec-

tion, the Avaya B179 uses the appropriate protocol even if you have set the phone to use UDP.

Protocol UDP (User Datagram Protocol) is a protocol on the transport layer

in the Internet Protocol Suite. It is a stateless protocol for short mes-

sages – datagrams. Stateless implies that it does not establish any

connection between sender and receiver in advance. UDP does not

guarantee reliability or ordering in the way that TCP does. Datagrams

may arrive out of order or go missing without notice. The advantages

it oers are speed and eciency.

UDP is the default protocol for SIP.

TCP (Transmission Control Protocol) is a protocol on the transport

layer in the Internet Protocol Suite. TCP is the standard protocol for