Uniden DECT1480 User Manual page 22

Interference is the most common cause of noise or static on a cordless
N�oise or Static on the Line oise or Static on the Line
phone. Here are some common sources of interference:
electrical appliances, especially microwave ovens
computer equipment, especially wireless LAN equipment and DSL

modems

radio-based wireless devices, such as room monitors, wireless
controllers, or wireless headphones or speakers

fluorescent light fixtures (especially if giving off a buzzing noise)
other services that use your phone line, like alarm systems,

intercom systems, or broadband Internet service

If static is on 1 handset or in 1
location:
-
Check nearby for one of the
common interference sources.
-
Try moving the handset away
from a suspected source, or try
moving the suspected source so
it's not between the handset and
the base.
-
There is always more noise at
the edges of the base's range.
If an Out of Range message
displays, try moving closer to the
base.
Sometimes, broadband Internet services that use the telephone line
Installing a Line Filter or DSL Filter
can interfere with phones. One of these services−DSL−often causes
static on telephones. A DSL filter or telephone line filter usually solves
this problem. The technician who installed your DSL service might
have left some filters for you; if not, call your DSL provider or look in
any electronics store.
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If static is on all handsets or in all
locations:
-
Check near the base for the
source of interference.
-
Try moving the base away
from a suspected source, or
turn off the source if possible.
-
If the base has an adjustable
antenna, try raising the
antenna so it stands straight
up.
-
If you have any service that
uses the phone line, you might
need a filter (see below).