A modular cable management trough system and method of assembly. Cable management trough includes a trough body having first and second terminal ends, first and second upright walls extending between the first and second terminal ends, and a base wall between the first and second upright walls, extending between the first and second terminal ends. The first and second upright walls and the base wall define a generally U-shaped trough having an open top and a trough interior for receiving at least one telecommunications cable. The trough body defines a receiving channel at the first end of the trough body. The channel has upright portions along the first and second upright walls and a base portion along the base wall. The channel may slidably receive a flanged end of an adjacent trough section in order to couple the adjacent trough section to modular trough section.
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