However, should you wish to use the telephone for a personal call, please contact your manager who will advise you of the procedure for booking these calls.
Fodd bynnag, os ydych am ddefnyddio'r ffôn ar gyfer galwad bersonol, cysylltwch â'ch rheolwr a fydd yn rhoi gwybod ichi beth yw'r drefn ar gyfer trefnu galwadau o'r fath.