Glossary
© 2012 Harmonic Inc.
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ProView 7000 v.2.6, Rev. E
teletext
An electronic communications system in which printed information is broadcast by television signal to
sets equipped with decoders.
TFTP
Trivial File Transfer Protocol. A simple form of the file transfer protocol (FTP). TFTP uses the user
datagram protocol (
). It is often used by servers to boot diskless workstations, X-terminals, and
routers.
TIA-232
A
TIA
standard interface for connecting serial devices, such as modems, mice, and serial printers to a
DTE
. TIA-232 supports the 25-pin D-type connector (DB-25) and a 9-pin D-type connector (DB-9).
TOT
Time Offset table.
tp
transponder
transport
In NMX, a transport is a submap that exists within the main submap. It contains a collection of
components and external devices as well as channels and circuits. The function of a transport is to
contain a collection of Harmonic components, input devices, output devices, and links, and to provide
access to the programs and circuits associated with that transport.
Transport Stream
One or more multiplexed compressed programs, typically containing video, audio, and associated data.
Defined by MPEG-2 Systems (ISO/IEC 13818-1), it can transport a wide variety of video and audio
compression formats.
TS
Abbreviation for Transport Stream, defined by MPEG-2 Systems (ISO/IEC 13818-1)
TS packet
MPEG-2 Transport Stream packet. The basic unit of an MPEG-2
. Each packet is 188
bytes, which includes a 4-byte header.
U
UDP
User Datagram Protocol. A connectionless protocol that relies on IP transport. Unlike TCP/IP, UDP/IP
provides no error recovery services, offering instead a faster way to send and receive datagrams over
an IP network.
UDP port
User Datagram Protocol used with GbE interface.
