Specifications

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Shielded cables must be used with this unit to ensure compliance with the
Class A FCC limits.
Computers which require handshaking need a connection between two
pins on the computer’s connector named DTR and DSR (Data Terminal
Ready and Data Set Ready). CTS may also need to be jumpered to RTS at
your computer interface (Clear To Send and Request To Send). The maxi-
mum recommended cable length is 15 meters. The cable can be longer if it
has < 2,500 pF capacitance. The load impedance of the device connected
should be between 3,000 and 7,000 ohms with no more than 2,500 pF shunt
capacitance.