The Cisco Model DPC2203 Cable Modem is a high-speed cable modem with an embedded media terminal adapter (EMTA). The DPC2203 features two RJ-11 telephone ports for Voice over Internet Protocol (VoIP) service along with a 10/100BASE- T Ethernet port and a USB 1.1 port for high-speed data connectivity.The DPC2203 is designed to meet PacketCable 1.5, PacketCable 1.0, and DOCSIS 2.0 specifications as well as being backward compatible with DOCSIS 1.1 and DOCSIS 1.0 networks. The DPC2203 uses advanced line-interface technology to provide multi-country, toll-quality, telephone service using existing in-home wiring. The DPC2203 supports full 5 REN phone loading on each phone line (10 REN total).The DPC2203 fully supports the CODECs specified in PacketCable 1.5. Standard VoIP call signaling is compliant with PacketCable's (MGCP/NCS) specifications.