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21:0621:06, 13 May 2025 45A Carrier (hist | edit) [789 bytes] Intcreator (talk | contribs) (Created page with "{{About|the carrier system in general|carrier system in the Connections Museum Seattle|CMS:45A Carrier}} '''45A Carrier''' is a 12 channel open wire voice frequency carrier system manufactured by Lenkurt Electric Company starting in 1952. It is comparable to Western Electric’s J carrier but uses a much more compact design. 45A first modulates four...") Tag: Visual edit

17:3617:36, 29 April 2025 Western Union Desk Fax (hist | edit) [431 bytes] Intcreator (talk | contribs) (Created page with "{{About|the machine in general|the machines in the museum|CMS:Western Union Desk Fax machines}} The '''Western Union Desk Fax''' is a desk-sized fax machine designed by Western Union and manufactured by the JP Seeburg Corporation starting in 1948. It produces images on Teledeltos paper by means of spark printing.") Tag: Visual edit

11:3911:39, 24 April 2025 North American Numbering Plan (NANP) (hist | edit) [2,979 bytes] Sarah (talk | contribs) (Created page with "The '''North American Numbering Plan''' ('''NANP''') is an integrated telephone numbering plan for twenty-five regions in twenty countries, primarily in North America and the Caribbean. This group is historically known as World Numbering Zone 1 and has the country code ''1''. Some North American countries, most notably Mexico, do not participate in the NANP. == History == From the Bell System's beginnings in 1876 and throughout the first part of the 20th century, te...") Tag: Visual edit

20:5520:55, 11 April 2025 Key system (hist | edit) [802 bytes] Sarah (talk | contribs) (Created page with "A key system is a type of telephone system designed to care for the communication needs of small to medium sized businesses. They offer many more user features than a normal single line telephone set, such as placing a line on hold, multi-line support. intercom service, attended transfer, etc. Unlike standard single-line telephones, which use a single wire pair to connect to a Central Office, key telephones require three wire pairs for each line. The ''talk pair'' is fo...") Tag: Visual edit