asynchronous

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asynchronous

 [a-sing´kro-nus]
1. pertaining to asynchronism.
2. in cardiac pacing terminology, said of a pacemaker that cannot sense any spontaneous underlying cardiac electrical activity, so that pacing is done at a fixed, constant rate.

asynchronism

(ā″sing′krŏ-nizm) [ ¹an- + synchronism]
1. The failure of events to occur in time with each other as they usually do.
2. Incoordination.
asynchronous (-nŭs), adjective
References in periodicals archive ?
Authorized terminals on the system can select the gateway and access the bisync environment.
Recently, the firm, which is a division of National Product Marketing, redesigned PC/Com to work with other popular printed-circuit boards that emulate 3270 terminals as well as SDLC and bisync terminal controllers, including boards from Forte and Quadram.
The Wellesley, Massachusetts firm's pcPATH and netPATH software operates in conjunction with a multi-function, dual-channel circuit card that plugs into a PC expansion slot to permit communications with SDLC or bisync protocols over leased and switched lines, the pcPATH products allow a variety of IBM-compatible personal computers to communicate with IBM hosts in SNA and bisync networking environments; the netPATH products permit 32 concurrent host communications sessions for all nodes on several popular LANs.
The initial products provide conversion from asynchronous ASCII to 3270 bisync and SNa operation, and 3270 de-conversion to asynchronous ASCII.
For example, Infotron provides program emulation through what it calls "Bisync Emulation," and incorporates it into its 790 Network Concentrator and 990 Network Processor multiplexing products to compensate for satellite delays and to increase communications link efficiency.
Bisync emulation removes non-productive polling traffic from the communications lines and handles all poll/select requests and acknowledgements locally.
At the FEP, a single communications line may address only one station (typical with older products like remote-job-entry stations running bisync).
These nodes support a wide variety of asynchronous Ascii devices, IBM 2741 and other non-Ascii asynchronous terminals, and synchronous devices using the X.25 or IBM SDLC, 3270 bisync or 2780, 3780 or Hasp bisync protocols.
Headquartered in Memphis, Tenessee, the firm provides on-line, transaction-oriented links to users of IBM 3270 bisync and SDLC protocols as well as the Burroughs Poll/Select communications discipline.