Host Packet Assembler/Disassembler

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Packet Assembler/Disassembler — A packet assembler/disassembler, abbreviated PAD is a communications device which provides multiple asynchronous terminal connectivity to an X.25 (packet switching) network or host computer. It collects data from a group of terminals and places… … Wikipedia
Packet Switch Stream — In the UK, PSS, was an X.25 based packet switched network, provided by the British Post Office Telecommunications and then British Telecom from 1980, onwards. After a period of pre operational testing with customers (mainly UK Universities and… … Wikipedia
X.25 — is an ITU T standard network layer protocol for packet switched wide area network (WAN) communication. An X.25 WAN consists of packet switching exchange (PSE) nodes as the networking hardware, and leased lines, Plain old telephone service… … Wikipedia

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