Model Model Number:TSM-120NET Functional Description 4E1+4FE PDH，order wire phone， 19"inch 1U，（Standard telephone interface, non-telephone handles）CONSOLE, SNMP managed optional Port Description One optical port，4 E1 interface (75/120 ohms),4* FE Ethernet interface. Power Power supply: AC180V ~ 260V；DC –48V；DC +24V Power consumption: ≤10W Dimension Product Size: 19 inch 1U 483X138X44mm(WXDXH) Weight 19inch 2.3KG