The SIP Advanced Settings are used to configure the advanced SIP settings of the conference(Outbound Proxy, Secondary SIP Server and Outbound Proxy for the Secondary SIP Server settings and to define other SIP server specific settings).
SIP Outbound proxy is an SIP server where all the SIP requests and other SIP messages are transferred. Some SIP servers use an outbound proxy server to escape restrictions of NAT. For example, Free World Dialup service uses an Outbound Proxy server.
If an Outbound proxy is specified for a conference, all SIP dial-out calls originated from that conference are made through that outbound proxy, i.e. all requests are sent to that outbound proxy.
Secondary SIP Server acts as an alternative SIP registration server when the primary SIP Registration Server is inaccessible. If the connection with the primary SIP server fails, Quadro will automatically start sending SIP messages to the Secondary SIP Server. It will switch back to the primary SIP server as soon as the connection is reestablished.
The SIP Advanced Settings page consists of the following components:
The Authentication User Name text field requires an identification parameter to reach the SIP server. It should be provided by the SIP service provider and can be requested for some SIP servers only, for others field should be left empty.
The Send Keep-alive Messages to Proxy checkbox enables the certain mechanism of the SIP registration server to the accessibility verification. Timeout text field indicates the timeout between two attempts for the SIP registration server accessibility verification. If no reply is received from the primary SIP server within this timeout, the Secondary SIP server will be contacted. When primary SIP server recovers, SIP packets will resume being
sent to it.
The RTP Priority Level drop down list is used to select the priority (low, medium or high) of the RTP packets sent from a corresponding conference. RTP packets with higher priority will be sent first in case of heavy traffic.
A group of Host address and Port text fields respectively require the host address (IP address or the host name) and the port numbers of the Outbound Proxy, Secondary SIP Server and Outbound Proxy for the Secondary SIP Server. These settings are provided by the SIP servers' providers and are used by Quadro to reach the selected SIP servers.