cated in the range of 28GHz to 45GHz, depending on the country. LMDS is a popular technique for deploying wireless local loop. LMI (local management interface) A Frame Relay specification for the method of exchanging status information between the user (e.g., bridge, router) and the network. LMP (Link Management Protocol) A protocol used in GMPLS networks that accommo- dates neighbor identification and link verification, as well as shared-risk groups, fault isolation, and topology-aware networks. load balancing A technique used to spread work between many processes, computers, disks, or other resources. Load balancing is a scalability problem for networks. loading Adding loading coils to a transmission line to minimize amplitude distortion. loading coil An induction device used in local loops, generally those exceeding 3.4 miles (5.5 km) in length, that compensates for the wire capacitance and boosts voice-grade frequen- cies. Loading coils are often removed for new-generation, high-speed, local loop data services because they can distort data signals at higher frequencies than those used for voice. local Pertains to a device that is connected directly to a computer without using a WAN com- munication line. local exchange The switching center in which subscribers' lines terminate. The local exchange has access to the other exchanges and to national trunk networks. Also called a central office, end office, serving office, or Class 5 office. local exchange trunk A trunk between the CPE and the local exchange. Also referred to as a central office trunk. local loop A line that connects a customer's telephone equipment with the local telephone company exchange. Often referred to as a subscriber line, an access line, or the last mile. local number portability A service that enables a person to keep his or her own telephone number when moving to a new location. local service area The area within which the telephone operating company uses local rates for calling charges. LocalTalk Apple Computer's proprietary 230.4Kbps b