Furuno FS-1562 - Page 278

FELCOM 80
H1-2
Multiple Telephone/Facsimiles
Install the PHONE I/F board (standard supply) in the Communication Unit and connect
it to the V. CODEC board as shown below.
Connection of more than one telephone requires Junction Box IB-311. In this case the
TEL1 and FAX1 modular jack on the Communication Unit IB-280 is not used.
IB-311
Junction Box
IB-280
Max. TEL 4 ,
FAX 2 units