NEC Dterm DTL-8R-1 Owner's Manual page 16

Document Revision 1
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Finally, it should be noted that some cordless telephones operate at frequencies that
may cause interference to nearby TVs and VCRs. To minimize or prevent such
interference, the base of the cordless telephone should not be placed near or on top
of a TV or VCR. If interference is experienced, moving the cordless telephone farther
away from the TV or VCR will often reduce or eliminate the interference.
More than One Cordless Telephone
If you want to use more than one cordless telephone in your office, they must operate
on different channels and more than 20 feet apart.
If more than eight DTL-8R-1s are used in the same area, there is a possibility that the
following problem occurs:
The DTL-8R-1 is limited to five RF channels. The RF channel is changed
automatically to find the best channel.
Depending on your environment, the maximum number of cordless devices used
without interference varies.
Multiple base and handset units should not be closer than 20 feet at any time.
Radio interference causes interruptions in conversation. When this happens, your unit
is not defective. When noise continues, move to a different location while you talk.
(You might even need to move the base unit.) When the situation persists, contact the
National Technical Assistance Center (NTAC).
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Difficulty connecting the Handset with the Base Unit
Some noises can be heard during conversation
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D
Specifications and Safety Information
Cordless DECT