ADTRAN 4740204G21 NetVanta 6240 IP BusinessGateway.Includes four T1 interfaces, 16 FXS ports, two 10/100 BaseT interfaces, 2 FXO ports, and full-featured AOS IP Router. Includes G.168 Echo Cancellation and support for G.711 and G.729a CODECs and supports up to 60