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The Western Electric model 500 telephone series was the standard domestic desk telephone set issued by the Bell System in North America from 1950 through the 1984 Bell System divestiture. The successor to the model 302 telephone, the model 500's modular construction compared to previous types simplified manufacture and repair and facilitated a large number of variants with added features. Touch-tone service was introduced to residential customers in 1963 with the model 1500 telephone, which had a push-button pad for the ten digits. The model 2500 telephone, introduced in 1968, added the * (asterisk) and # (pound) keys.
The model 500 telephone series and its derivatives were very popular and common among North American businesses and households throughout the latter half of the 20th century. The development of new simpler telephone set designs, the advent of mobile phones, and the decline of traditional landlines into the 21st century led to the decline of the model 500 series and its derivatives, and most sets still in use are primarily kept by seniors and phone enthusiasts for familiarity, collecting, and nostalgia. However, the model 2500 is still produced by several manufacturers as of the early 2020s, with modernized components to ensure compatibility with modern Bluetooth and voice over IP telephony systems.