Telecommunications cassette

A telecommunications cassette (14, 114) comprising a body (30) having a front (32) and an opposite rear (34), two rows (38) of RJ45 jacks (20) disposed on the front (32), and two MRJ21 connectors (36) disposed on the rear (34). The two rows (38) of RJ45 jacks (20) are oriented opposite to one another, and the two rows of RJ45 jacks are offset from one another. The MRJ21 connectors (36) are oriented in the same direction, and the MR21 connectors (36) are vertically offset from one another. Two circuit boards (52, 56) are provided within the body (30), wherein one row (38, 39, 40) of RJ45 jacks (20) is connected to a respective one of the MRJ21 connectors (36), and wherein one of the circuit boards (50, 52, 56) includes a notch (66) for receiving one of the MRJ21 connectors (36, 37, 41).