IBM System/36 Maintenance Information Manual page 147

RTS. Request to send.
RWS. Remote work station.
SA. Service aid.
SDLC. Synchronous data link control.
SDLCTEST. SDLC online test (procedure). See
also BSCTEST, COMMTEST, and STATEST.
SETCOMM. Set communications (configuration
procedure). See also ALTERCOM,.
SLCA. Single-line communications adapter.
SNA. Systems network architecture.
SNA profile. A description of the characteristics of
a systems network architecture protocol.
SNBU. Switched network backup.
spindle. The shaft that turns the disk.
SRC. System reference code.
SSA. Sequential sector address.
SSP. System support program product.
STATEST. Station test (procedure). See also
BSCTEST, COMMTEST, and SDLCTEST.
supervisor call. An instruction that causes control
to be passed to the control storage processor.
SVC. Supervisor call.
switched network backup. In data communications,
an alternative method of connecting two systems
over telephone lines when the primary method of
connection is by leased lines.
synchronous data link control. Rules that control
data movement over a communications line
connecting two devices that use a communications
adapter.
Sys Req. System Request (key).
system customize utility. A utility under dedicated
DCP that lets you update the system microcode on
disk, using the diagnostic diskettes.
system reference code. A 4-character code displayed
as part of a system message, as part of a diagnostic
message, or displayed in the control panel display.
systems network architecture. An IBM
communications protocol for controlling
information transfer in a data communications
network.
SYSTEST. System test.
task. A unit of work.
TB. Terminal block.
TCC. Top card connector.
TDS. Transmit data space.
Tektronix. Trademark of Tektronix, Inc.
template. An overlay panel used as a mask to
interpret the communications line status or autocall
status displayed in the 4-character display on the
control panel.
TESTREQ. Test request (procedure).
TI. Test indicate.
TP. Test point.
trade. See World Trade.
TV. Test unit.
twinaxial cable. A twisted-pair shielded cable that
connects a keyboard/display or work station printer
to the system.
UDT. Unit definition table.
undervoltage. A condition that occurs when power
supply voltage is too low.
unit definition table. An area on disk or in storage
that contains entries that describe the devices that
run under control of the SSP.
UV. Undervoltage.
V. Volt.
Vac. Volts, alternating current.
Appendix D. Glossary
D-5