4/27/20 Added keypad on analog pin.
4/12/20 Bugfix. Sometimes welcome message played twice.
4/5/20 The use of the dialtone can now be switched on or off. Code 
3/28/20 Added settings for Equalizer. [x] where x= 0-5. 0=Normal, 1=Pop, 2=Rock, 3=Jazz, 4=Classic, 5=Bass (files 070.mp3 - 075.mp3
3/28/20 Added file during startup, ready for use. (file 002.mp3)
3/12/20 Remote control on pin 16 added
3/7/20 Added dialcode 611 to switch on/off useRandomFolder when phone was ringing and write setting to EPROM
3/2/20 Use random folder or not when phone was ringing
2/27/20 Added ringsound when button is pushed while phone is on the hook
2/13/20 Serialbuffer overflow fixed
2/13/20 Added resetfunction to white button. Reset if pressed > 5 seconds
2/13/20 Disabled debug function (DEB = false)
2/12/20 Button can only be pushed when phone is picked up
2/12/20 Systemsounds now stops when phone is hung up
2/7/20 Fixed Volume bug
2/7/20 Randomseed added