Glossary
GL-30
Cisco 6260 Hardware Installation Guide
OL-2365-02
X
x
DSL
Generic term used to refer to digital subscriber line equipment and services, including ADSL, IDSL,
SDSL, and SHDSL. All are digital technologies that provide high bandwidth over existing copper
infrastructure provided by the telephone companies.
x
DSL Transmission
Unit—central office
See xTU-C.
x
DSL Transmission
Unit—remote
See xTU-R.
x
TU-C
x
DSL Transmission Unit—central office. A hardware device that supports
x
DSL communication and
that is placed in the CO. The
x
TU-C has a matching unit on the subscriber premise in the form of an
x
TU-R. The two units, in combination, support a high data rate over UTP copper cable local loops.
Examples of
x
TU-Cs are ATU-C, ITU-C, STU-C, and SHTU-C.
x
TU-R
x
DSL Transmission Unit—remote. A hardware device that supports
x
DSL communication and that is
placed in the customer’s premise. The
x
TU-R has a matching unit in the carrier’s CO in the form of
an
x
TU-C. The two units, in combination, support a high data rate over UTP copper cable local loops.
Examples of
x
TU-Rs are ATU-R, ITU-R, STU-R, and SHTU-R.