| Name | SM1- Sovereign Multi-Pay Payphone |
| Date | late 1990s to present |
| Manufacturer | Landis & Gyr |
| Usage | Booths |
| Further notes |
| SM1- Sovereign Multi-Pay Payphone The Sovereign Multi-Pay Payphone (SM1) was introduced by British Telecom in the late 1990s as a versatile, wall-mounted public payphone capable of accepting multiple payment methods, including coins, BT optical Phonecards, and chip-based cards. Manufactured by Landis & Gyr, the SM1 was designed to replace earlier single-payment models like the Sovereign Card Payphone (SC1), offering greater flexibility and convenience for users. The SM1 featured a digital display that provided real-time information on call charges, remaining credit, and call duration. It supported local, national, international, and emergency calls, as well as operator-assisted services. Its robust construction and secure cash compartment made it suitable for high-traffic and vandalism-prone areas. |
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