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Gateway ISDN-IP
Gateway ISDN-IP (GII) is a low-cost VoIP gateway, allowing 30 simultanous voice connections (vidocalls as option). GII is conncted to ISDN network by PRI interface (E1 2Mbit/s). DSS1 (Q.912/Q931) protocol and electrical interface G.703/120Ω is utilized. At IP side, GII uses H.323 family protocols. GII uses H.323 Gatekeeper or dedicated directory server for telephone numbers translation. GII is made of microcomputer with Linux operating system and specialized peripherial cards for ISDN PRI controller and DsP based voice codecs. GII capabilities: 
• ISDN PRI 2Mbit/s interface: • elecric interface G.703/120Ω • optical interface with CMI coding, HDB-3 as option • G.704 framing • DSS1 (Q.921/Q.931) protocol • 30 simulatanous connections • IP network interface • Ethernet 100Base-Tx 100 Mbit/s interface • Optical interface 100Base-Fx as option • H.323 VoIP protocol • Telephone number translation: • GateKeeper based translation • Directory server based translation • Translation based on private GII database • DSP based voice codec translation • SNMP v.3 based management • LINUX OS, running from CompactFlash memory card • Software: • H.323 protocols stack • DSS1 procotol stack • SNMP protocol stack • Size: 250mm·180mm·411mm • Working temperatures: -10°÷ +50°C • Power feed: 27VDC (22÷30) |