... realize flow media conversion between the IP and PSTN.Large port access gateway Standard SIP protocols Standard G.723.1,G ... Telnet, Voice promptPhysicalUniversal Power SupplyOutput:12VDC, input:100-240VAC/50HzEnvironmentalOperational:32-104°For 0-40°CStorage:14-140°For -10-60 ... ETSI,BT,NTT, and, DTMF-based CIDPolarity ReversalYesHomologationSafetyULComplianceFCC,CE Dinstar 32 Port FXS SIP ATA Gateway