The PC Assistant provides easy access to the most common functions provided by a NEC UX5000 telephone. By using this application, users can easily manage their call handling tasks without having to switch their attention between the UX5000 telephone and PC.
To Program speed dial numbers in your PC Assistant follow these steps:
1.) Press File
2.) Choose [...]

At any Samsung phone with a display – do not lift handset
Press Transfer 800
Display says enter passcode – enter 4321 (If you get a pass code error start over and use Transfer 200 and the pass code 1234 instead)
Press 1 to enable programming
press speaker
dial 505 to enter the time and date program
display show WMMDDYYHHMM
W = [...]