Yes, had you normalized your original design, you would have had a separate telephone table that stored the numbers. Now, you must normalize your design and convert your data to use the new design.
New table - TelephoneType
ID (PK Autonumber)
TelephoneType (Text - contains "cellular", "home", "office", "barnyard", whatever)
Description
FromDate
ToDate
etc.
New table - PartyTelephones
ID (PK Autonumber)
PartyID (FK from whatever table your people/organizations live in)
TelephoneType (FK from above table)
Description
FromDate
ToDate
etc.
This arrangement works well when multiple people don't share the same telephone. It is a good beginning step towards normalizing your design. Please look up normalization.