Telephone Set
Aug/050
Why pay too much for Telephone Set items?
Check out these Telephone Set-related listings from eBay and save!
![]() NEC NITSUKO 124i DX2NA-32 SYSTEM WITH 13 TELEPHONE SETS US $409.99
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![]() TelradConnegy SpeakerPhone Full Duplex Telephone System ~ 79-630-1000/B Set of 3 US $9.50
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![]() AVAYA 2420 Digital Telephone Set US $89.00
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![]() SANYO STANDARD KEY TELEPHONE SET # STN2000.BRAND NEW US $5.00
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![]() TOSHIBA DKT 2010H 10BTN HANDSFREE TELEPHONE SET Refurb US $20.99
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![]() INTER-TEL AXXESS 550.4500 LCD TELEPHONE SETS CHARCOAL US $59.00
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![]() NORTEL NORSTAR M7208 TELEPHONE SETS (BLACK REFURBISHED) US $49.99
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![]() COMDIAL IMPACT SCS 8024S TELEPHONE SETS Black US $54.00
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![]() AVAYA MERLIN BIS 34 STANDARD TELEPHONE SETS BLACK US $49.00
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![]() COMDIAL IMPACT SCS 8024S TELEPHONE SETS GREY US $54.00
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![]() NEW Nortel Meridian M2616D Display 9K Telephone Sets (Black) US $99.99
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![]() REF NORTEL NORSTAR MERIDIAN T7316E TELEPHONE SET NT8B27 US $90.00
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![]() Panasonic KX-T7250 Telephone set in white or black US $109.95
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![]() AVAYA SPIRIT 6 BUTTON SPEAKERPHONE TELEPHONE SETS BLACK US $89.00
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![]() AVAYA SPIRIT 6 BUTTON SPEAKERPHONE TELEPHONE SETS White US $89.00
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![]() NORTEL NORSTAR M7208 TELEPHONE SETS (GREY REFURBISHED) US $49.00
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![]() PANASONIC KXT 123220 WHITE SPEAKER TELEPHONE SET US $45.00
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![]() TADIRAN CHARCOAL 120-D DIGITAL DISPLAY TELEPHONE SET. US $90.00
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![]() Plantronics m12 telephone head set US $49.99
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![]() PANASONIC KX-T7731 DISPLAY SPEAKERPHONE TELEPHONE SETS US $134.99
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![]() TADIRAN 280D TELEPHONE SET * US $55.00
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![]() Porcelain Desktop Telephone Clock Photo Frame Decor Set US $28.70
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![]() Avaya Partner 18 telephone set - Black US $31.99
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![]() NEC DTU-8D-2 Electra Elite 8 Button Display Telephone Set & Handset US $15.00
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![]() Lot of 6 Toshiba DKT2010H Telephone Set DKT 2010-H US $50.00
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![]() *NEW IN BOX!* - Avaya Callmaster VI Telephone Set US $70.00
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![]() Lot of 6 Toshiba DKT2010S Telephone Set DKT 2010-S US $90.00
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![]() *NEW IN BOX!* - Avaya Callmaster IV Telephone Set US $50.00
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![]() AVAYA 2420 Digital Telephone Set missing stand and handset US $74.99
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![]() TECHNCOM INTERNATIONAL EXECUTIVE TELEPHONE SET US $12.99
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![]() MITEL SUPERSET 420 TELEPHONE SETS DARK GREY OR WHITE US $48.00
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![]() LUCENT AVAYA LEGEND MLX 10DP TELEPHONE SETS BLACK US $48.00
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![]() LUCENT AVAYA LEGEND MLX 10D TELEPHONE SETS BLACK US $45.00
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![]() BELL LABS LUCENT TECHNOLOGIES 8400 TELEPHONE SET ~ NEW IN BOX ~ FREE SHIPPING US $49.95
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![]() PLDT 42-S 42S Telephone Set US $299.00
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![]() Brand New Mitel 5312 IP Telephone Sets (Black) US $129.00
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![]() Brand New Nortel M3903 Display Telephone Set (Charcoal) US $129.00
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![]() Brand New Nortel M3902 Display Telephone Set (Charcoal) US $119.00
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Why are calculator keypads and telephone key pads set out differently?
telephone keypads always have 123 across the top and 789 along the bottom.
Calculators are the opposite.
Does anybody know the history of this?
the telephone tone pads came first. they had to be used by common people and starting top/left proved easiest to understand. this layout also places the alpha characters, which were in common use at the time, in proper sequence. fyi the bottom row is not 789 but *0#, in fact dtmf actually has 16 tones, and some times you see nerds carrying a complete 16 button pad.
NASA invented the electronic calculator for the space program. The first users of this technology was accountants to replace adding machines. the original adding machine had a column of buttons, starting at 1 on the bottom and working up to 9 at the top. in this application it made sense for the numbers higher on the column to be bigger numbers. there was a column of numbers for each decimal place, so this type of adder was a huge array of buttons. the 10 key adder was an improvement. because the number of buttons was limited, an accountant didn't need to move his hand around and could in-fact learn to operate without having to watch the keys. keeping eyes on the book meant much faster operation. the layout of the 10 key adder followed adding machine format of putting smaller numbers on the bottom. Managers did not want to retrain their best accountants, so the calculator was made to emulate the 10 key adder and not the telephone touch pad.
Chill Town (Will and Mike Boogie) phone calls COMPLETE SET
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