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trellis coded pulse amplitude modulation. Trellis coding provides forward error correction, while
TC-PAM
pulse amplitude modulation is a modulation scheme where a continuous analog signal is represented
with a series of discrete analog samples.
Transmission Control Protocol. The major transport protocol in the Internet suite of protocols
TCP
providing reliable, connection-oriented, full-duplex streams. See SLIP.
The virtual terminal protocol in the Internet suite of protocols. It allows users of one host to log in to
Telnet
a remote host and use resources as if they were connected to a local system.
Trivial File Transfer Protocol. A simple file transfer protocol (a simplified version of FTP) that allows
TFTP
files to be transferred from one computer to another over a network. TFTP does not offer
password security.
A pair of wires that provide the electrical connection between a telephone set and the local CO. The
tip and ring
more electrically positive side of a POTS telephone line (0 V) is the tip. Its counterpart is the ring,
which is the more negative side, 52 v).
Physical arrangement of network nodes and media within a networking structure.
topology
A block of information that is transmitted at the end of a message to trace error impacts and
trailer
missing blocks.
The handshake procedure that initiates and establishes an end-to-end xDSL connection
training
The mode, either standard or quick, that a DSLAM port employs when it is training to a CPE. The
training mode
training mode uses RADSL technology to adjust line speed according to noise conditions on the
transmission line.
See TCP.
Transmission
Control Protocol
Message sent by SNMP agent to an NMS, a console, or a terminal to indicate the occurrence of a
trap
significant event, such as a specifically defined condition or a threshold that was reached. See also
alarm and event.
A method of connecting devices that is similar to a bus topology, except that tree networks can contain
tree topology
branches with multiple nodes. Transmissions from a station propagate the length of the medium and
are received by all other stations. Compare with bus topology, daisy-chain topology, ring topology, and
star topology.
See TC-PAM.
trellis coded pulse
amplitude
modulation
A channel coding technique which provides forward error correction capability.
trellis encoding
See TFTP.
Trivial File Transfer
Protocol
Two insulated copper wires twisted together with the twists or lays varied in length to reduce potential
twisted pair
signal interference between the pairs.
OL-2365-02
Cisco 6260 Hardware Installation Guide
Glossary
GL-27
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