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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
SCI
Switch communications interface
SCO
System control office
SCOTCH
Switch Conferencing for TDM Bus in Concentration Highway
SCSI
See
small computer 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 party on his or her behalf.
single-carrier cabinet
A combined cabinet and carrier unit that contains one carrier. See also
Multicarrier cabinet.
single-line voice terminal
A voice terminal served by a single-line tip and ring circuit (models 500, 2500, 7101A, 7103A).
SIT
Special-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
SN
Switch Node
SNA
Systems Network Architecture