trunk

(1) A communications path generally between items of
equipment within a building (two switchboards, for example).
A trunk may also be used between central offices, cities,
etc. (2) A two-wire or four-wire circuit which can be a
leased or Government owned facility connecting the EVS
System with external or remote equipment. Normally, these
facilities will be terminated at either the ARTCC or RCAG
Main Distribution From (MDF) of the EVS System. The trunk
will normally include the protection and isolation equipment
when leased facilities are used. The trunk can be switch
connected at one (1) or both ends.