HP Msr20-10 Multi-service JD431A, Router - 4-port switch (integrated), Wired, Protocol TCP/IP, L2TP, RSVP, NTP, PPPoE, Processor 1 x 333 MHz, Ram 256 MB DDR SDRAM, Flash Memory 32MB, Desktop - modular - 1U. The HP A-MSR20 series features a modular design that delivers unmatched flexibility for small branch offices and small to medium-sized businesses, while reducing complexity, simplifying management, and increasing control.