Gigaset - A full manual is available from www.siemens.com
Program Key is bottom right.
To register:
Unplug mains then plug back in.
Press Program 7 Program then place handset in base.
Key Lock, Hold # for a second to lock or unlock the keypad.
Memories, Press Program, Phonebook, then enter a Location number (0 to 9) then enter the phone number followed by Program.
To dial from Memory, Press Phonebook, Location number then Talk.
Handset Volume, Press Program, 0 then choose 1-3 for level, then Program
Ringer Type, Press Program, 6 then choose 1-2 for type, then Program
Ringer Volume, Press Program, 5 then choose 1-3 for level, then Program.
Redial use "-> ->" key