Vertical comdial DX-120, Руководство по установке и обслуживанию

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DX-120 Installation and Maintenance Manual
T
ECHNICAL
P
ROBLEM
S
OLUTIONS
Static and / or noise can be heard during a conversation (continued)
Telco problem If static/noise is heard on CO lines only:
1) Determine if other extensions also hear the
noise/static.
If other extensions also hear the noise/static:
2) Determine if other CO lines affected (ie.e.,
either several or only a few).
3) Disconnect CO line at interface point and
connect Lineman's test set to the same point of
connection
ahead of the system.
If noise/static persists:
4) Contact the local servicing telephone company
and request repair.
If noise/static can be isolated to the DX-120
equipment:
5) Verify which CO line ports are affected (which
CO ports seem to have noise/static).
6) Replace interface modules as required.
Programming lost
or changed. Digital Executive
Telephone display. Intended
programming
change. Check with system administrator for incidental
changes made.
PC-DBA
programming
changes Send All
operation. When using PC-DBA to make customer database
changes you must take special precaution not to
overwrite existing data with residual PC-DBA
working directory values. When using PC-DBA to
update any database, it is highly recommended to
perform the function
Receive All prior to making any
specific database changes to assure that the
working directory database matches the database in
use at the customer site.
Bad Memory battery If power fluctuations occur and the memory battery
backup battery is low or bad, the customer database
is susceptible to being defaulted (factory settings
loaded) whenever a power interruption occurs. If
this occurs change the standard (photo-cell type)
lithium battery.
Diagnostic Quick Reference Chart (continued)
Symptom(s) Diagnostic Aid Cause(s) Action