Autotel 【Public Automated Land Mobile】
Autotel which is also known as the Public Automated Land Mobile is a radiotelephone service. Autotel was developed for rural British Columbia, Canada, where building a network of low-power cellular terminals to cover a forest would have been highly expensive.
Autotel used digital signaling for supervisory messages (call setup, ringing, channel assignment, etc.) and analog voice channel. It used high-power (35 watt) VHF channels.