MADRID, Spain, April 2 – 3Com Corp. and Atento Telecomunicaciones Espana, a subsidiary of the Telefonica Group, said that 3Com would be supplying the networking infrastructure for Atento's 6000 users. The contract includes the 3Com Switch 4007, 3Com SuperStack 3 Switch 3300, 3Com Transcend Network Supervisor and the 3Com EtherLink 10/100 PCI NIC with 3XP Processor family of products. 3Com is supplying Atento with full advisory and technical support for the implementation.