An apparatus and method are provided for attaching a plurality of fiber-optic terminals to a telescoping arm so that the number of premises that may be served from a single location such as a handhole, manhole or vault may be increased without a substantial increase in equipment cost. A telescopic extension arm assembly is provided that has a telescopic arm with a first fiber-optic terminal affixed to one side of the telescopic arm and a second fiber-optic terminal affixed to a second side of the telescopic arm. Also provided is a mounting apparatus for attaching multiple fiber-optic terminals to the telescoping arm.