pay phone story

Name	TSA-4 ELECTRONIC COINPHONE (1985–2000)
Date	c. 1985
Manufacturer	Telkor Payphones (TMSA – Telephone Manufacturers of South Africa Ltd.)

Information and images with special thanks to Mark Van Der Heever and Peter Van Almelo

Development of the Blue TSA-4 1989

The TSA series represented the final generation of South African public coin telephones and reflected Telkom’s transition from electromechanical to fully electronic public telephony. Development began with field trials during the 1983/84 financial year, when 100 wall-mounted and 200 table-model prototypes were tested. Full production commenced in 1985 with the distinctive blue pre-payment coinphone, replacing the earlier yellow and orange prototypes. Unlike previous post-payment telephones, users inserted coins before making a call. The first models accepted the new 10c, 20c, 50c and R1 coins and introduced direct international dialling.

Early production models featured a simple ten-button keypad for use on both electronic and older exchanges. By 1990 the improved TSA-4 had been introduced, incorporating a larger LCD display, enhanced electronics and either twelve- or sixteen-button keypads that provided additional functions such as last-number redial, volume control and user guidance. The telephone accepted both old and new South African coin series, including the R5 coin, making it highly adaptable during periods of currency change. Optional multi-card attachments also allowed the use of prepaid and debit cards.

Engineered to be Y2K compliant, the TSA-4 replaced the TSA-2 and TSA-3 during the 1990s and became Telkom’s flagship public payphone. It remained the standard South African public telephone until the rapid rise of mobile phones led to the decline of the public payphone network in the early 2000s. The TSA-4 stands as the most advanced and successful South African coin-operated telephone ever produced.

The earlier model South African Orange Cardphone and later Telkor GPT cardphones appear to have been derived from the British GPT Telecom Products public telephone platform. While adapted and manufactured by Telkor (TMSA) for South African conditions, the striking similarity in cabinet design, component layout and operating features strongly suggests a technology transfer or licensing agreement between GPT Telecom Products and Telkor during the late 1980s. Direct documentary evidence of the agreement has yet to be located, but the physical similarities and Telkom’s later reference to a “GPT type cardphone” provide compelling circumstantial evidence.