Vertical comdial DX-120, Руководство по установке и обслуживанию

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T
ECHNICAL
P
ROBLEM
S
OLUTIONS
DX-120 Installation and Maintenance Manual
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No sound heard
over loudspeaker
in speakerphone
mode. 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.
Static and / or
noise can be heard
during a
conversation Process of
elimination.
Industry standard
technician testing
tools (lineman's
test set, etc.)
Another extension If only static is heard when connected to a
specific extension during an intercom call:
Examine that extension.
Station cabling/MDF
wiring If static exists on all calls:
1) Check station cabling/wiring and all MDF
connections.
2) Correct any problems.
Extension apparatus If noise persists:
1) Change-out swappable components (handset,
handset cord).
If noise continues:
2) Try a known good extension connected to this
station cable.
Static and / or noise can be heard during a conversation (continued on next page)
Diagnostic Quick Reference Chart (continued)
Symptom(s) Diagnostic Aid Cause(s) Action