DEFINITY Enterprise Communications Server Release 8.2
Upgrades and Additions for R8r
555-233-115 Issue 1
April 2000
Glossary and Abbreviations
GL-44
SCD
Switch-control driver
SCISwitch communications interface
SCO
System control office
SCOTCH
Switch Conferencing for TDM Bus in Concentration Highway
SCSI
See small comp uter system interface (SCSI).
SDDN
Software-Defined Data Network
SDI
Switched Digital International
SDLC
Synchronous data-link control
SDN
Software-defined network
SFRL
Single-frequency return loss
SID
Station-identification number
simplex system
A system that has no redundant hardware.
simulated bridged appearance
The same as a temporary bridged appearance; allows the terminal user (usually the principal) to
bridge onto a call that had been answered by another par ty on his or her behalf.
single-carrier cabinet
A combined cabinet and c arrier unit that contains one carrier. See also Multicarrier cabinet.
single-line voice terminal
A voice terminal served by a single-line tip and ring circ uit (models 500, 2500, 7101A, 7103A).
SITSpecial-information tones
small computer system interface (SCSI)
An ANSI bus standard that provides a high-level command interface between host computers and
peripheral devices.
SMDR
Station Message Detail Recording
SNSwi tch No de
SNA
Systems Network Architecture