DSL LAN Extender 200 User’s Guide
© 2002 Black Box Corporation
Page 5
Telephone Wire Requirements
The telephone circuits recommended for the DSL LAN Extender
200 are commonly known as Dry Line,
Dry Pair, Raw Copper Line, or Alarm Circuit. Now, it is often referred as DSL Line or ADSL Line.
When ordering a DSL line from a Telco, make sure to tell the telephone company that you need a non-
loaded line with no bridged taps on it. For example, Pacific Bell’s Local Area Data Channels (LADC) use
USOC code to specify a 2-wire dry line as “T6E2D”.
NOTE:
The term “non-loaded” or “non-loaded coils” means no passive lowpass filter for voice spectrum on the
line. With a lowpass filter, the loop is used for voice signals only, the high frequency spectrum of signals
(above 4Khz) will be filtered out, and the loop cannot be used for xDSL signal transmission.
To have a dry line from a Telco, the
loaded coils
in the Telco’s Central Office and
bridge taps
at punch
down blocks
MUST BE REMOVED
from the subscribed line.
Installation Diagram
