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Glossary and Abbreviations
Issue 5 January 1998 GL-43555-230-024
RS-449
Recommended Standard 449
RSC
Regional Support Center
ROSE
See Remote Operations Service Element (ROSE).
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
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).