AM3270/TR3271 Reference Manual

Glossary
086705 Tandem Computers Incorporated Glossary–3
CUP. Communications Utility Program. Similar to COUP, it allows online
configuration of devices without the need to repeat the system generation process.
CUP, however, can only configure dedicated (also called “non-6100” or “non-
downloadable”) controllers and their associated subdevices, such as terminals and
printers.
For lines controlled by AM3270 or TR3271, you cannot configure subdevices using
either INSTALL/SYSGEN or DSC/COUP. Configure and add subdevices using SCF,
CMI, or CUP, depending upon the release, and also upon the controller type
associated with the subdevice.
DCE. Data Circuit-terminating Equipment, also called Data Communications
Equipment. DCE generally refers to the modem to which a terminal or host computer
(called the DTE) is connected.
dedicated controller. Byte-synchronous controller, such as the 6202, that has the
following characteristics. In previous manuals these controllers were referred to
variously as “non-6100” or “non-downloadable.”
Permanent, hard-coded logic (not downloaded logic)
Supports one protocol on all ports (not multiple protocols)
Multiple operations interfaces (not fully reconfigurable on-line)
Single input/output paths (not dual paths)
device. For AM3270 subsystems this refers to the line. See also subdevice.
DSC Dynamic System Configuration. An online configuration program introduced in
the C-series GUARDIAN 90 operating system. It allows the user to add many
peripherals to a running system. Users cannot configure disks with DSC. The user
interface to DSC is COUP.
DSR. Data Set Ready. A signal coming from a modem that usually indicates to the
computer equipment that the modem is powered on.
DTE. Data-Terminating Equipment. DTE is the terminal or host computer to which a
modem (called the DCE) is connected.
DTR. Data Terminal Ready. DTR is a DTE signal to indicate to the DCE that the DTE is
powered on and ready.
EBCDIC. Extended Binary-Coded Decimal Interchange Code. A method of coding data
designed for synchronous use. It consists of 8 bits of data with no parity bit. There are
256 standard characters.
frame. Also called a message block. The basic unit of communication for bisync
protocols.
full-duplex. A method of serial communication in which the data flow between two
points can occur in both directions simultaneously.
Guardian 90. The main Tandem operating system.
half-duplex. A method of serial communication in which the data flow between two
points can occur in only one direction at a time.