Clear-Com EF-701M - Manual (Page 41)

E F - 7 0 1 M I N T E R F A C E 3 - 3
Levels don’t match from
one end to the other. 1. Additional level adjustments may be
available on the modems.
2. Clear-Com/RTS jumper is set
incorrectly.
1. Always begin a setup with these set to
their nominal levels.
2. Reset jumper.
Excessive noise or poor
frequency response. Various causes related to modems and
the network rather than to the
party-line equipment. Know the performance parameters of the
transmission system.
Level adjustment controls
seem to work backwards. DB-15 is not wired correctly. Check and correct wiring.
Symptom Cause Solution