DA610
IMPORTANT: This procedure deletes all memory contents of the telephone including the telephone book, redial list etc.!
1.) Lifting the handset
2.) Press memory key
3.) Enter 1 250
4.) Press memory key
5.) Replace the handset
DA 710 & DA810A
IMPORTAN: This procedure deletes all memory contents of the telephone including the telephone book, redial list etc.!
1.) Lifting the handset
2.) Press the menu key
3.) Enter 1 250
4.) Confirm with OK
5.) Replace the handset