Foundation of a diversified payphone business
The Sentinel® phone is extremely dependable. Our housing includes features like
advanced coatings, all-metal superdials and waterguard seals that make our
hardware the best on the market. Surface mount technology, utilized on our
smart chassis, and smart circuit design, reduces failures and lowers life cycle
costs. It's that combination that makes the Sentinel® such a great smartphone.
The Sentinel® phone uses either Protel's Model
310 Chassis or Flash 7000 Chassis.
With tens of thousands of installations serving millions of users worldwide,
the Sentinel® phone can be the foundation of any payphone route. Training is a
breeze. The keypad diagnostics give field technicians a step-by-step procedure,
and like all Protel coin phones the Sentinel® phone has a simple start up
process.