leg - technical definition

A segment or portion of an end-to-end path associated with a call. For example, an international voice telephone call via the public switched telephone network (PSTN) has an originating leg supported by a local exchange carrier (LEC) in one nation, a terminating leg supported by a LEC in another nation, and an international leg supported by an interexchange carrier (IXC) that interconnects the two national LECs. See also IXC, LEC, and PSTN.