SIP Settings Help

The SIP (Session Initiation Protocol) Settings provide information about SIP receive UDP and TCP ports and allows you to select DNS server configurations for SIP and the SIP timers scheme.

The text field UDP Port indicates the SIP UDP (User Datagram Protocol) receive port number. By default the port 5060 is selected and used. SIP UDP port cannot be in the selected RTP/RTCP port range for FXS and IP lines (see RTP Settings) otherwise "Mapped port for SIP shouldn't be in RTP port range" error message appears.

The text field TCP Port indicates the SIP TCP (Transmission Control Protocol) receive port number. By default, the port 5060 is selected and used.

Note: Quadro will not use TCP protocol as a transport for SIP messages if the TCP Port field is left empty.

The TLS Port indicates the SIP TLS (Transport Layer Security) receive port number. By default, TLS port is not used and is empty (coded to 0). TLS port number should be different from the TCP Port number.

The Realm text field requires messaging level information to be included in SIP messages sent by Quadro. This information might be used by remote side for authentication purposes.

Enable Session Timer checkbox enables advanced mechanism for the connection activity checking. This option allows both user agents and proxies to determine if the SIP session is still active.

DNS server for SIP radio button group allows you to choose between regular DNS servers configured in the DNS Settings page and specific DNS servers for SIP traffic.

• Use default selection is used to apply regular DNS servers for SIP traffic.
• Specific selection is used to enable SIP specific DNS servers. For this selection, primary and secondary SIP DNS server should be defined in the SIP DNS 1 and SIP DNS 2 text fields. At least primary DNS server should be inserted. The IP-Clipboard buttons offer a conveniant possibility to enter IP addresses that have been used before.

SIP Timers radio button group is used to define the timeouts of the SIP messages retransmission.

• RFC 3261 selection will apply standard SIP timers described in the corresponding specification.
• High availability selection will apply SIP timers to shorten the call establishment, registration confirmation and registration failure procedures. This selection provides more firmness to the SIP connection but increases the network traffic on the Quadro.
• Custom selection allows to manually define the Registration Timeout, Registration Failure Timeout, Transaction Duration and Session refresh timeout SIP Timers (in seconds).

Host aliases for SIP link leads to the page where Quadro's external aliases are listed.

Generate and Install New CA Root Certificate link leads to the page where new CA root certificate may be defined, generated and installed.

Download Current CA Root Certificate link is used to download the actual CA root certificate in a .crt format.