CXR Larus CV-SE28-IU E1 G703/2Mbps, G704/ N x 64K (version IE) or T1 CSU-DSU, D4/SF/ESF format, Nx 64 kbps converter (vertion IU) to V28/RS232 synchronous 64/128kbps and async up to 112,5kbps ,DTE cable DB25F, alluminium case w front connectors, internal power supply 230Vac