The Calix 100-01665 1GE 1550nm 120Km RT is a high-quality switch module designed for enterprise networking. It features a 20+4 pin connector and is compatible with Calix products. This unit has 24 network ports with optical LC ports, a maximum data rate of 1000 Mbps/1 Gbps, and comes with a 2-year manufacturer warranty. Made in China, this product is ideal for customers looking for reliable and efficient networking solutions.