cm88The CAMD CM887070C provides full DTMF receiver capability by integrating both the bandsplit filter and dital decoder functions into a single 18CM88-CM: 1 x RJ45 console port 1 x RJ45 MGMT port. USB. CM88-CM: 2 x USB 2.0 ports (No capacity limit. The 2G4G8G16G32G capacity is tested.)