: 21 LAN Ethernet 10/100 BASE-TConsole PortVoice ProcessingProtocol: SIP(RFC3261)DTMF: RFC2833, SIP Info, In-bandCodec: G711a, G711u, G.722, G.723, G.726, G.729a, GSM, ADPCM, iLBCTransport: UDP, TCP, TLS, SRTPEcho Cancellation: ITU-T G.168 LECTelephonyBlacklistCall detail recordsCall duration limitationCaller IDCaller ID prefixCall routing rulesHotlineSIP trunk supportSIP peer modeSIP Registrar for IP phonesT.30 FaxT.38 faxTrunk groupTwo-stage DialingISDN SpecificationEach interface can be configured NT or TEType of Connection: Point to Point Or Point to MultipointBRI Switch Types: National ISDN Type 1 and Type 2, Nortel DMS100, AT&T 4ESS, Lucent 5ESS, EuroISDN, Q.SIGInternetDDNSIP BlacklistNAT TraversalQoS/ToSStatic RouteSystemMax 8 Concurrent CallsBackup and restoreCustom promptsFirmware upgrade by HTTP/TFTPLED IndicatorsPacket Capture ToolSystem logsSecurity: Firewall, TLS, SRTP, HTTPSWeb based configurationApplicationsConnect legacy PBX to VoIP servicesConnect IP-PBX to ISDN trunkingsISDN connectivity for Contact CenterConnect legacy PBX to IP-PBX at the branch officeInterconnect multiple PABX to realize free inter-office callsPhysical

: 213x160x44 mmPower Supply: AC 100-240V (12V 2A)Operation Range: 0°C to 40°C, 32°F to 104°F

Range: -20°C to 65°C, -4°F to 149°FHumidity: 10-90% non-condensing