Cortelco 2211 사용자 설명서
DELETING CALLS ..................................................................................... 13
MESSAGE ERROR ..................................................................................... 13
PRIVATE CALLS ........................................................................................ 14
UNKNOWN CALLS .................................................................................... 14
MESSAGE ERROR ..................................................................................... 13
PRIVATE CALLS ........................................................................................ 14
UNKNOWN CALLS .................................................................................... 14
TELEPHONE SERVICE PROBLEMS ................................................................. 15
MAINTENANCE INFORMATION ....................................................................... 16
TELEPHONE REPAIR ......................................................................................... 17
FCC INFORMATION .......................................................................................... 18