CXR Larus CV-SE28-RU AMS4/16 rack card w front connectors, E1 G703/2Mbps, G704/ N x 64K (version RE) or T1 CSU-DSU, D4/SF/ESF format, Nx 64 kbps converter (vertion RU) to V28/RS232 synchronous 64/128kbps and async up to 112,5kbps ,DTE cable DB25F,