A Cable Modem Termination System (CMTS, 42, FIG. 1) having a gateway configured to output signals over tunnels, wherein the tunnels are one way and out-of-band messages (FIG. 1) are sent over said tunnels (FIG. 1)....http://www.google.de/patents/US7961742?utm_source=gb-gplus-sharePatent US7961742 - Cable modem termination system having a gateway for transporting out-of-band messaging signals
