[Asterisk-Users] Extra parameters in SIP URIs

[Cerrajetto]

Hello,

I've seen that Nuance SIP audio provider supports additional information
(parameters and extra headers) in SIP URIs, using the format:

sip:user:password at host:port;uri-param1;uri-param2?header1&header2

For example,

sip:1234 at myserver.com;extra_header=Uui?Uui=Hello

Does Asterisk support this format?

Is there a way to retrieve the value of these additional headers, and then
decide the action (Dial, Playback, etc.) as desired? (I'm thinking in an "if
... then ... elsif ... else ...").

Thanks,
Cerrajetto