The ONU R-1503 is part of Salira's family of Optical Network Units designed to deliver broadband services to residential and commercial subscribers, with the bandwidth and speed advantages of fiber. When connected to Salira's DePONTM system, these ONUs integrate seamlessly into a DOCSIS-based network to replace cable modems while requiring no changes to existing DOCSIS and OSS operating procedures. The ONUs are engineered to support the most demanding service requirements and comply with the latest IEEE, MEF, and ITU-T standards as well as CableLabs' PacketCableTMMultimedia (PCMM) specifications. The Salira ONU R-1503 is the residential model of a triple-play device, with a streamlined enclosure design that is well-suited for residential installations. The ONU has four Gigabit Ethernet ports for data traffic, two POTS interfaces to support advanced voice features, and one analog cable port for video transport. The device also supports wireless WiFi access and an optional backup battery.