javax.sip
Interfaces 
AccountManager
AuthenticationHelper
ClientTransaction
Dialog
ListeningPoint
SecureAccountManager
ServerTransaction
SipListener
SipProvider
SipStack
TlsSecurityPolicy
Transaction
UserCredentialHash
UserCredentials
Classes 
DialogState
DialogTerminatedEvent
DialogTimeoutEvent
IOExceptionEvent
RequestEvent
ResponseEvent
SipFactory
Timeout
TimeoutEvent
TransactionState
TransactionTerminatedEvent
Enums 
DialogTimeoutEvent.Reason
Exceptions 
DialogDoesNotExistException
InvalidArgumentException
ObjectInUseException
PeerUnavailableException
ProviderDoesNotExistException
SipException
TransactionAlreadyExistsException
TransactionDoesNotExistException
TransactionUnavailableException
TransportAlreadySupportedException
TransportNotSupportedException