The company was a provider of computer network connectivity, monitoring and management hardware and software.

The company's I/O connectivity offerings, including its line of Ethernet and Fibre Channel-based connectivity products, are or were used in server and storage products from OEMs, including Cisco, Dell, EMC Corporation, Fujitsu, Hitachi, HP, Huawei, IBM, NetApp, and Oracle Corporation.

"[6] By 1983, Emulex was able to advertise its products as if it were grocery items: a 2-page spread headlined "One stop shopping for VAX users?

[12][13] After Emulex's board of directors recommended against the sale, Broadcom increased their offer to $11 per share on June 30, which valued the company at $925 million.

[16] In February 2015, Avago Technologies Limited announced it would acquire Emulex for $8 per share, in cash.