A telecommunications system (14) includes a chassis (12) defining a front (18), a rear (16), and a plurality of first signal connection locations (38) adjacent the rear (16). A plurality of removable cassettes (10) are housed within the chassis (12), each including a cassette body (68) defining a fixed portion (80) that is coupled to one of the first signal connection locations (38) on the chassis (12) and a movable portion (82) that telescopically slides relative to the fixed portion (80), wherein the movable portion (82) is configured for movement in a direction from the front (18) to the rear (16) of the chassis (12), each cassette (10) defining a plurality of second signal connection locations (58). A cable (24) between the fixed portion (80) and the movable portion (82) extends out from the movable portion (82) when that portion (82) is pulled forwardly to an extended position and is retracted into the cassette body (68) when the movable portion (82) is pushed rearwardly relative to the fixed portion (80).