TC Communications TC1920, Руководство пользователя

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Chapter 4 Management through the Web Screens
4-25 TC1920 Rev 1.3 User Manual
Proxy Server
Server Selection Proxy (or Proxy Server) is used to establish, modify,
and terminate call sessions. The TC1920 needs to
register to the Registrar Server first, which usually has
the same address as the Proxy Server.
Outbound Proxy is a proxy server that receives
requests from clients, even though it may not be the
server resolved by the Request-URI. It is similar to
Proxy except it receives a request from TC1920 even if
the Request-URI of the message indicates another
server. In short, all messages from TC1920 must pass
through Outbound Proxy if it is set.
In some cases, the Outbound Proxy is placed alongside
the firewall and is the only way to allow SIP traffic to
pass from the internal private network to the Internet
therefore acting as a gatekeeper.
Proxy Server
Address Configure the address of the Proxy Server or Outbound
Proxy Server as an IP address or hostname.
UDP Port Configure the UDP port number of the proxy server
listening port. The value setting here should match the
SIP Port.
Default is 5060.
Session Expiry Configure the refresh duration of the session. The
TC1920 will resend "INVITE" every other time which is
approximately half of “Session Expiry” value and
negotiated Session-Expires header will be seen in 200
OK reply of first INVITE message.
Default is 1800.
Min. Session
Expiry Configure the minimum expiry interval that can be used
for a session.
Default is 100.