3Com Corp is shipping Asynchronous Transfer Mode LAN Emulation software for its backbone and workgroup switches, claiming to be the first vendor to offer ATM Forum-compliant local area network emulation across both switches and interface boards. The software is available on the firm’s Asynchronous Transfer campus backbone switch, the CELLplex 7000, the LinkSwitch 2700 Ethernet-Asynchronous Transfer workgroup switch (CI No 2,358), as well as its ATMLink network interface boards.