Yeastar S20 VoIP PBX Without Module

Product Description Users 20 Max Concurrent Calls 10 Max Analog Ports 4 Max BRI Ports 4 Max Cellular Ports 1 Max E1/T1/J1 Ports – VoIP Trunks 20 Protocol SIP (RFC3261), IAX2 Transport Protocol UDP, TCP, TLS, SRTP Codec G711 (alaw/ulaw), G722, G726, G729A, GSM, Speex, ADPCM, iLBC, H263, H263P, H264, MPEG4 DTMF In-band, RFC4733, RFC2833, SIP INFO LAN 1 × 10/100 Mbps WAN 1 × 10/100 Mbps IP Services Static IP, DHCP, VPN, Firewall, VLAN, DDNS, PPPoE, QoS, Static NAT, STUN Voicemail 5000 min (expandable) Firewall Yes T.38 Fax Yes App Center Yes External Storage TF Card USB – Power DC 12V 1A Size (L x W x H) (cm) 16 x 16 x 3 Weight 0.3 kg Power Consumption 1.8-10.6 W Environment, Operation Range: 0°C to 40°C, 32°F to 104°F; Storage Range: -20°C to 65°C, -4°F to 149°F; Humidity: 10-90% non-condensing Mounting Desktop & Wall-mount 1U Rack-mount