X25AM Programming Manual

X25AM Programming Manual—527201-001
Glossary-1
Glossary
This glossary includes a selection of terms used in this manual.
ABEND. Abnormal termination of a process.
address. Unique network designation identifying a device.
ASCII. American Standard Code for Information Interchange. Standard method of coding
data, consisting of seven bits for each character plus one parity bit.
ATP6100. A NonStop Kernel-specific protocol used to access remote terminals, also refers
to a communications subsystem. HP recommends using ATP6100 rather than
TERMPROCESS, which has more limited functionality.
baud. Unit of signaling speed equal to the number of signal events per second. Not
necessarily bits per second.
binary synchronous communications (BSC). Communications protocol using a standard
set of control characters and control character sequences for synchronous
communications.
bit. Binary digit. Smallest unit of information, represented as a 1 or a 0.
block mode. Data transmission mode for a terminal. Transmitted data messages consist of
groups of characters instead of single characters.
BPADPARMS. Block mode user-settable options for configuring a Packet
Assembler/Disassembler (PAD).
buffer. Area of storage temporarily reserved for performing an input/output (I/O) operation,
into which data is read or from which data is written.
byte. String of eight bits.
call accepted packet. Packet that a remote entity sends to the network in response to an
incoming call packet, if a circuit can be established.
call clearing. Descriptive phrase for the activities required for disconnecting a virtual
circuit.
call connected packet. Packet that the network sends to a caller in response to receiving
a call accepted packet from a remote entity.
call redirection. Optional network facility allowing the network to pass a call to another
subscriber number.
call request packet. Packet that a caller sends to a network addressed to a remote entity
to initiate a call.