Duofone (430-0233) Features Faxback Doc. # 7190 The DUoFONE Multi-Line Controller can be used with most key telephone systems utilizing an Amphenol-Type cable connector. It should not be used with "com key" systems or special phone systems. The DUoFONE Multi-Line Controller is FCC-approved the FCC number is: AAD-93V-62515-OT-N The USOC Code for this Product is: RJ24XC You may install the DUoFONE Multi-Line Controller yourself and no monthly telephone charges should occur. Install only via the connector provided. Do not attempt to modify any telephone wiring or connections. (br/all-7/19/94)