/*
 @param username 用户名
 @param password 密码
 @param domain ip/域名+端口
*/
 SipTelephoneManager.getInstance(Context context).login(String userName,String domain,String password);

SipTelephoneManager.getInstance(Context context).destroy();

/*
 @param number号码

*/
 SipTelephoneManager.getInstance(Context context).call(String number); 

 new SipContext(getApplicationContext());

void de_electricity();

void call();

end();

void incoming_Call();

SipTelephoneManager.getInstance(Context context).terminateCurrentCall();