The Cisco 576 LRE CPE is a simple one-port bridge that translates LRE into Ethernet. The Cisco 576 CPE has one Fast Ethernet port and two RJ-11 connectors: one for the analog phone and one for the LRE link. The Cisco 576 LRE CPE is only interoperable with the Catalyst 2950 LRE 997 switch as part of the Cisco Long-Reach Ethernet networking solution.