Based on this product's specifications, here are some alternatives and similar models
DECT Base Station Mitel RFP 47 White
Summary description:
The Mitel RFP 47 DECT base station offers 12 channels and supports advanced security with 802.1x RADIUS. It features voice codecs G.711, G.722, and G.729ab for high-quality audio. The station has an SMA antenna connector and is housed in durable ABS material with an IP20 safety rating. With dimensions of 150 x 40 x 150 mm and a weight of 345 g, it operates on an input voltage of 37 - 57 V, making it a reliable choice for communication needs.