DCP Series Telcon Message Manual - Public Support Login - Unisys

Glossary
Internet Protocol (IP)
The routing protocol that resides at the internet (network) layer (layer 2) of the TCP/IP
architectural model. The IP is a connectionless datagram protocol that routes data to host
systems within a complex system of multiple network nodes and interconnected
networks. The IP provides datagram service, delivery service, general network services,
and error reporting services.
internetwork
A large physical network made up of many interconnecting packet-switching networks.
Connections are made through gateways that implement appropriate subnetwork
protocols.
Interprocess Communication (IPC)
1) A function that provides communication services for all system processes.
2) A facility that provides communication services for all applications. IPC can be one or
more software products or a logically identifiable part of a larger product, with the
larger product also providing application-specific services.
3) Communication for DDP file transfers. Activated by an NMS RFS command on this
DCP or another DCP, or an @IPF or @DDPFJT command on an OS 2200 series host
for a DCP node. Not related to the NMS XFER command.
IP
IPC
IPM
ISO
L
LAN
See internet protocol or internetwork protocol.
See interprocess communication or interprocess control.
See interprogram message.
See International Standards Organization.
See local area network.
Line Protocol Handler (LPH)
The Telcon software module that controls a particular line protocol, such as UDLC or the
UNISCOPE line handler. The LPH is responsible for all the logical functions that control a
communication line and provides the interface between the devices attached to that line
and the Telcon network. Examples are UNILPH, TTYLPH, and NTRLPH. See also
LPHTRS module, which is a resource to the LPH modules.
Line Protocol Handler Terminal Resource Services (LPHTRS)
Handles terminal control block (TCB) allocation and deallocation when a terminal signs
on ($$SON command) and signs off ($$SOFF command).
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