### Web-Specific System Values

The interaction between the system and the Web application involves several system parameters. Each is listed, followed by specific processing requirements of note to Web developers.

- WMLEXCEPT - Web application HTTP proxy server exception domains. These are domains the proxy server will not use. The WMLEXCEPT value is a list of one or more domains, separated by commas without any intervening spaces (up to 127 total ASCII characters, including commas).
- WMLHOME - URI of the Web application home page.
- WMLPORT - TCP port number used for the HTTP proxy server.
- WMLPROXY - IP Address, in dotted-decimal or DNS name format, of an HTTP proxy server.

If the system value WMLHOME is null, the telephone cannot display the Browser label under the “A” Avaya application.

If WMLPROXY is null, or if WMLPROXY cannot be resolved into a valid IP Address, an HTTP proxy server is not used.

If WMLPROXY is resolved into a valid IP address and WMLEXCEPT is null, the HTTP proxy server is used for all Web transactions. If WMLEXCEPT is not null, the HTTP proxy server is only used for URLs whose domains are not on the WMLEXCEPT list.

If the Web pages accessed by the telephone are completely on the customer’s intranet, WMLPROXY, WMLPORT and WMLEXCEPT need not be set. If WMLPROXY is null, the values of WMLPORT and WMLEXCEPT do not matter.