The Cisco uBR7200 series universal broadband routers comprise Cisco's Cable Modem Termination System (CMTS) solution. The routers are based on Data Over Cable Service Interface Specifications (DOCSIS) and support data and digitized voice connectivity over a bidirectional cable television and IP backbone network. The Cisco uBR7200 series routers typically concentrate traffic from DOCSIS-based cable modems and set-top boxes (STBs) with integrated EuroDOCSIS cable modems on the cable television network and present that traffic to local and remote Internet Protocol (IP) hosts. For NCTA cable plants not fully upgraded to support two-way cable transmission, the routers work in conjunction with dial-up access products to support upstream traffic from DOCSIS-based cable modems connected to the Public Switched Telephone Network (PSTN).