javax.servlet.sip
Interfaces 
Contact
Proxy
SipAddress
SipApplicationSession
SipApplicationSessionListener
SipErrorListener
SipFactory
SipServletMessage
SipServletRequest
SipServletResponse
SipSession
SipSessionActivationListener
SipSessionAttributeListener
SipSessionBindingListener
SipSessionListener
SipURI
TelURL
URI
Classes 
SipApplicationSessionEvent
SipErrorEvent
SipServlet
SipSessionBindingEvent
SipSessionEvent
Exceptions 
TooManyHopsException