switchboard operator, answering machine, telephone, phone, hotline, callers, voicemail, helpline, faxes, dials, receptionist, caller id, desk, hotlines, telephonist, misdial, teletype machine, helpdesk, pabx, telemarketer, telex machine, pager, call, teleprinter, offices, dialtone, redial, dispatch, teletype, mailroom, staffer, boiler, payphone, callback, intercom, beeper, inquiries, paging, ringing, eavesdropper, emails, newsroom, doorbell, staff, servers, postbox, telex, alarms, outage, speakerphone, transformer, radiotelephone, bleeper, morse code, webform, emergency, cloakroom, beck, prompter, website, typewriter, bakelite, mimeograph machine, teletypewriter, addy, radiogram, foyer, contactor, answerer, power outage, telesales, callee, telegraph operator, phonebook, generator, pin number, lightning arrester, immersion heater, scheduler, gaslight, photocopier, wrvs, webpage, vonage, john bartlett, toilets, bush telegraph, canteen, centigram, queries, air conditioning, baud, booth, ethernet cable, pbx, malfunctioning, pressroom, substation, repairperson, upstairs, loo, tannoy, switchboards, machine, billboard, database, furnace, switch, switches, computer, lathe, loader, refrigerator, warehouse, cooker, terminal, blackboard, blender, adjoint, aspectual, bilinear, commutative, contractive, covariant, decomposable, derivative, dyadic, elliptic, hermitian, integral, intensional, interrogative, invariant, keypunch, monadic, multiplicative, multipole, nonlocal

annunciator, operator

phone system, telephone system

central, exchange, telephone exchange

patchboard, plugboard