BellSouth Business^SM Native Mode LAN Interconnection (NMLI) service is a high-speed (4, 10, 16 or 100 Mbps) shared fiber option transport for the interconnection of customer-owned local area networks (LANs).

NMLI provides a means of basic LAN extension for customer-owned Ethernet (IEEE Standard 802.3 and 802.3u) or Token Ring (IEEE Standard 802.5) LANs. A customer with multiple LANs in an area served by NMLI service may interconnect these LANs through NMLI service. The signals at the NMLI port meet IEEE 802.3, 802.3u and 802.5 standards.