Fiber Optic Essentials

256 Acronyms and Initials

SL superlattice

SLA secure level agreement

SM single mode

SMC surface mount component

SMD surface mount device

SMDS switched megabit data services

SMF single-mode fiber

SMP shared memory processor

SMT station management frames

SMT surface mount technique

SMU Sanwa multi-termination unibody

SNMP simple network management protocol

SNR signal-to-noise ratio

SNZ Standards Association of New Zealand

SOF start of frame

SOHO small office/home office

SOJ small outline packages with J leads

SONET Synchronous Optical NETwork

SP shelf processor

SPC statistical process control

SPE synchronous payload envelope

SPIBOC standardized packaging and interconnect for inter and

intra board optical connections (a part of the EC

ESPRIT program)

SPIE Society of Photooptic Instrumentation Engineers

SQNR signal-to-quantum-noise ratio

SQW single quantum well

SRAM static random access memory

SRM sub-rate multiplexing

SRS stimulated Raman scattering

SSA serial storage architecture

SSA storage system architecture

S-SEED symmetric self electro-optic effect devices

SSI small scale integration

SSP storage service provider

ST connector–subscriber termination

STP shielded twisted pair

STS synchronous transport signal

SWDM sparse WDM

SWF surface wave filter

SX short wavelength (850 nm) transmitter

Acronyms and Initials 257

TAB tape access bonding

TAB tape automated bonding

TAXI transparent asynchronous transceiver/receiver interface

TBGA Tape ball grid array

TC transmission convergence sublayer

TCM time compression multiplexing

TCP/IP transmission control protocol/internet protocol

TDFAs thulium doped fiber amplifiers (to be used in the

wavelength range of 1450–1510 nm)

TDM time division multiplexing

TDMA time division multiple access

TE mode transverse electric (electric field normal to direction

of propagation)

TE triethyl (as in triethylgallium—TEGa)

TERKS trade name of a data base used by Telcordia (formerly

Bell Labs) to track inventory and depreciation on

telecommunications hardware

THC through-hole component

THT token holding timer

THz tera hertz

TIA Telecommunications Industry Association

TIA trans-impedance amplifier (also TZA)

TM mode transverse magnetic (magnetic field normal to

direction of propogation)

TM trimethyl (as in trymethylgallium-TMGa)

TO transistor outline

TOSA transmitter optical subassembly

TP twisted pair

TRT token rotation timer

TRTT target token rotation time

TRX transceiver

TTI time to installation

TTL transistor-transistor logic

TUG tributary unit groups

TWA traveling wave amplifier

Tx transmitter

TZA trans-impedance amplifier (also TIA)

UDP user datagram protocol

UHV ultra high vacuum

258 Acronyms and Initials

UI unit interval

UL Underwriters Laboratories

ULP upper level protocol

UNI user–network interface

USNC United States National Committee

UTP unshielded twisted pair

UV ultraviolet

VAD vapor axial deposition

VBR variable bit rate

VC virtual circuit

VCC virtual channel connection

VCI virtual channel identifier

VCO voltage-controlled oscillator

VCSELs vertical cavity surface emitting lasers

VDE Verband Deutscher Electrotechniker (Association of

German Electrical Engineers)

VDI Vereins Deutscher Ingenierure

(German Standards)

VF-45 trade name of a small form factor optical

connector developed by 3M corporation with a

RJ-45 latch

VLIW very long instruction word

VLSI very large-scale integration

VPI virtual path identifier

VPN virtual private network

VPR vapor phase reflow

VT virtual tributary

VTG virtual tributary group

WAN wide area network

WDM wavelength-division multiplexing

WWSM wide spectrum WDM

XDF extended distance feature

XGP Multi-Gigabit Ethernet pluggable

XPR cross plug range

XRC extended remote copy

ZBLAN fluorozirconate