Triple-Play Service Deployment

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Glossary
ST Stuffing Table. An optional DVB-SI table that authorizes the replacement of
complete tables due to invalidation at a delivery system boundary such as a cable
headend.This table is located on PID 0x0014.
STB Set top box. A digital TV receiver (IRD).
STD System Target Decoder. A hypothetical reference model of the decoding process
defined by MPEG-2.
Step-index fiber A fiber whose index of refraction (n) changes sharply at the interfaces of its core
and cladding.
STT System Time Table. An ATSC PSIP table that carries time information needed for any
application requiring schedule synchronization. It provides the current date and
time of day and is located on PID 0x1FFB.
Sync Bits Synchronizing bits (more properly bytes or characters) used in synchronous
transmission to maintain synchronization between transmitter and receiver.
Syncs Number of times the unit has trained.
Table A format in which service information is transmitted. Tables are further divided into
subtables, then into sections, before transmission. Several types of tables are
specified by MPEG, DVB, and ATSC. Refer to the JDSU MPEG Pocket Guide for more
information on types of Service Information tables and their functions.
TCP/IP Transmission Control Protocol/Internet Protocol.The official protocol of the Internet
and Web.
Telecommunications An enclosed space for housing telecommunications equipment, cable terminations,
Closet and cross-connect cabling. The telecommunications closet is a recognized crossconnect
between the backbone and horizontal cabling subsystems.
Telecommunications A fixed connecting device where the horizontal cable terminates.The telecommu-
Closet nications outlet provides the interface to work area cabling.
Time-stamp An indication of the time at which a specific action must occur in order to ensure
proper decoding and presentation.
TOT Time Offset Table. An optional DVB SI table that supplies the UTC time and date and
shows the difference between UTC time and the local time for various geographical
regions.The PID for this table is 0x0014.
TP Twisted Pair
TR 101 290 ETSI recommendation priorities for monitoring MPEG-2/DVB transport streams.
Transmitter An electronic package used to convert a signal carrying electronic information to a
corresponding optical signal for transmission by fiber.The transmitter can be a light
emitting diode (LED), laser diode, or vertical cavity surface emitting laser (VCSEL).
Transponder Trans(mitter) and (res)ponder. Refers to the equipment inside a satellite that
receives and re-sends information.
Transport Packet 188-byte packet of information in a transport stream. Each packet contains a
header and a payload.