Specifications

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DX-120 Installation and Maintenance Manual TECHNICAL PROBLEM SOLUTIONS
Cannot hear other
connected party
Another digital
telephone
Component failure 1) Lift handset
If the intercom dial tone is not heard over the
handset:
2) Hang up (put the handset in the cradle).
3) Press the SPK button.
If dial tone is heard over the loudspeaker:
4) Replace handset and repeat the first test.
If there is still no dial tone heard through the
handset:
5) Replace the handset cord and retest.
Still no dial tone heard:
6) Replace the telephone.
AND/OR
If dial tone is not heard over the loudspeaker
(ON/OFF button test):
7) Replace the telephone.
NOTE:
The above test requires you to set the feature "Auto Select" for intercom operation ("ICM").
Other party can't
hear you while
using the
speakerphone.
Another digital
telephone
Connection /
component failure
1) Press the SPK button.
2) Listen for dial tone over the loudspeaker.
3) Call a working extension.
NOTE
The called extension should use the
handset for this test.
4) Verify two-way connection.
If the called extension cannot hear your voice:
5) Verify that MUTE is not enabled (i.e., status
lamp flashing red).
6) Lift the handset and verify two-way connection
using handset.
If verified as a speakerphone problem:
7) Replace the telephone.
Diagnostic Quick Reference Chart (continued on next page)
Diagnostic Quick Reference Chart (continued)
Symptom(s) Diagnostic Aid Cause(s) Action