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COMSPHERE 3900 Series Modems
C-4 November 1996 3910-A2-GN32-30
Auxiliary Cables Not Supplied
To add an external telephone to your modem, use an external “Y” cable to connect the phone
line to both the modem and the telephone (Figure C-2).
Figure C-2. Wiring Diagram — “Y” Cable for External Telephone