Clear-Com RS-601 (No longer available) - Manual (Page 39)

R S - 6 0 1 B E L P A C K 3 7
PROBLEM Call light stays on.
CAUSE DC voltage present on audio line pin 3.
SOLUTION Check cables for shorts and cross-wiring.
Make sure there is a termination on the
channel.
PROBLEM Mic level too low or too high.
CAUSE Mic distance from mouth too far or too
close; mic gain set incorrectly; sidetone set
incorrectly; no terminations or more than
one termination.
SOLUTION Reposition mic and/or change headset mic
gain.
PROBLEM Headset level too low or too high.
CAUSE Unterminated channel; improper
impedance; shorted line.
SOLUTION Adjust sidetone and volume controls; check
wiring; use compatible headset.