Amphe-OBTS Circular Power Connectors Amphenol Industrial Amphe-OBTS Circular Power Connectors are outdoor connectors designed for harsh environments. These optimized base transceiver station connectors provide remote wireless radio power delivery. The Amphe-OBTS series is based on the previous Amphe-BTS series. The Amphe-OBTS series reduced the weight of this field-installable connector by 30% and added improved passive intermodulation (PIM) performance. Other features include clip retention contacts, zinc shell construction, EMI shielding, and shock/vibration resistance. Amphenol Industrial Amphe-OBTS Circular Power Connectors are offered in a variety of power configurations.