Instruction manual

DEFINITY® Business Communications System and GuestWorks® Issue 6
Overview
555-231-208
Issue 1
April 2000
Glossary and Abbreviations
GL-30
S
S1
The first logical signalling channel of DCP. The channel is used to provide signaling information for
DCP’s I1 channel.
S2
The second logical signaling channel of DCP. The channel is used to provide signaling information
for DCP’s I2 channel.
SABM
Set Asynchronous Balance Mode
SAC
Send All Calls
SAKI
See sanity and control interface (SAKI)
.
sanity and control interface (SAKI)
A custom VLSI microchip located on each port circuit pack. The SAKI provides address recognition,
buffering, and synchronization between the angel and the five control time slots that make up the
control channel. The SAKI also scans and collects status information for the angel on its port circuit
pack and, when polled, transmits this information to the archangel.
SAT
System access terminal
SCC
1. See single-carrier cabinet
.
2. Serial communications controller
SCI
Switch communications interface
SCO
System control office
SCOTCH
Switch Conferencing for TDM Bus in Concentration Highway
SDDN
Software-Defined Data Network
SDI
Switched Digital International
SDLC
Synchronous data-link control
SDN
Software-defined network
SID
Station-identification number
simplex system
A system that has no redundant hardware.