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DCP Series Telcon Message Manual - Public Support Login - Unisys

DCP Series Telcon Message Manual - Public Support Login - Unisys

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Glossary<br />

File Transfer Protocol (FTP)<br />

A method of transferring files between computers with different operating systems.<br />

Established by the TCP/IP internet community from original DDN standards, FTP is the<br />

fastest and most globally-accepted method of transferring or viewing files between<br />

computer systems.<br />

flow control<br />

A function that controls data flow within a layer or between adjacent layers. Flow control<br />

prevents queue and buffer overspill and data loss when the receiver is unable to accept<br />

data.<br />

Frame Relay<br />

A data communications protocol developed in 1990 based on Integrated Services Digital<br />

Network (ISDN) standards. Frame Relay is designed to accommodate bursty data<br />

applications by providing high transmission speeds, low network delay, high connectivity,<br />

and efficient bandwidth use.<br />

Frame Relay User Device<br />

A device attached to a Frame Relay network that is capable of using the Frame Relay<br />

protocol for exchanging of information between it and other Frame Relay user devices<br />

attached to the Frame Relay network.<br />

FTP<br />

G<br />

See file transfer protocol.<br />

global common system subroutines<br />

Contains two location counters: $1 for procedures that can be called by any other<br />

procedure through the CALL instruction; $2 for subroutines in virtual address SDR5<br />

(address 2800-2FFF) that can be called within any other procedure through the SCALL or<br />

JLR instructions.<br />

H<br />

hard throttle<br />

An extremely low memory state where normal processing is not possible and the <strong>DCP</strong>/OS<br />

must terminate runs to revive the system.<br />

HCC<br />

See host channel control (HCC) module.<br />

HCONFIG<br />

Configuration processor that converts configuration statements to omnibus elements that<br />

<strong>Telcon</strong> can read.<br />

Host Channel Control (HCC) module<br />

Controls the channel protocol with CMS 1100.<br />

Glossary–6 7436 0728–303

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