Clue | Length | Answer |
---|---|---|
Voice/data transmission standard (abbr.) | 4 letters | isdn |
Integrated Services Digital Network: Abbr. | 4 letters | isdn |
High speed phone line (abbr.) | 4 letters | isdn |
Voice/data connection (abbr.) | 4 letters | isdn |
Voice/data connection abbrev. | 4 letters | isdn |
Phone line abbr. | 4 letters | isdn |
High spd phone line | 4 letters | isdn |