The prohibition turns on the use of an electronic, mechanical or other device. Telephone or telegraph equipment or facilities, or their components, furnished to the subscriber or user by a provider in the ordinary course of its business and used by the subscriber or user in the ordinary course of its business (or furnished by the subscriber or user to connect to the service and so used), and equipment used by a provider in the ordinary course of its business, are not such a device. An employer's use of its phone system to monitor business calls can fall outside the prohibition where the monitoring is in the ordinary course of business; hearing aids are also excluded.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.