Time-based wireless pairing between a medical device and a wall unit

A system for use in a healthcare facility comprising a network and a nurse call system, the system comprising

• a medical device having a first wireless transceiver, a first timer, and a power cord terminating at a power plug, the medical device having a first sensor to determine that the medical device is receiving power via the power plug and power cord, and
• a wall unit mounted at a fixed location in a patient room of the healthcare facility, the wall unit having a second wireless transceiver and a second timer, the wall unit receiving AC power from the healthcare facility, the wall unit carrying an AC outlet into which the power plug of the medical device is coupleable, the wall unit having an AC plug sensor that senses the power plug being plugged into the AC outlet, wherein the first timer is started to measure a first uptime in response to the first sensor sensing that the medical device is receiving power via the power plug and the power cord, wherein the second timer is started to measure a second uptime in response to the power plug being sensed by the AC plug sensor of the wall unit, wherein the medical device is configured to transmit to the wall unit from the first wireless transceiver an advertisement including the first uptime, wherein the wall unit compares the first uptime with the second uptime and, if the first uptime is within a predetermined tolerance range of the second uptime, the wall unit sends a pairing message to the medical device which results in the wall unit and medical device becoming automatically paired for subsequent wireless communications.