Ports 48 autosensing 10/ 100 ports( IEEE 802.3 Type 10BASE-T, IEEE 802.3u Type 100BASE-TX) , Media Type: Auto-MDIX, Duplex: half or full; 1 RJ-45 serial console port; 2 autosensing 10/ 100/ 1000 ports( IEEE 802.3 Type 10BASE-T, IEEE 802.3u Type 100BASE-TX, IEEE 802.3ab Type 1000BASE-T) , Duplex: 10BASE-T/ 100BASE-TX: half or full; 1000BASE-T: full only; 2 open mini-GBIC ( SFP) slots Mounting Mounts in an EIA-standard 19 in. telco rack or equipment cabinet ( hardware included) ; horizontal surface mounting only Memory and processor Processor : MIPS @ 300 MHz, 16 MB flash, packet buffer size: 2 MB, 128 MB SDRAM Latency 100 Mb Latency: < 6.2 µ s ( LIFO) ; 1000 Mb Latency: 95% reduction, 0.5 period; 30% reduction, 25 periods; EN 61000-3-2, IEC 61000-3-2; EN 61000-3-3, IEC 61000-3-3 Dimensions and weight Minimum dimensions ( W x D x H) 34.29 x 44.2 x 4.39 cm Weight 7.58 kg