Yeastar GSM Compact Modular VoIP PBX - S20

Device Type: Compact Modular VoIP PBX (Yeastar S20)
Video Output: N/A (Voice Communication Appliance)
Data Ports: 1 × 10/100 Mbps LAN Port (RJ45); 1 × TF Card Slot (for recording expansion)
Network: VoIP (SIP, IAX2); Supports up to 20 VoIP Trunks; Protocols: UDP, TCP, TLS, SRTP
Capacity: Up to 20 Users; 10 Concurrent Calls; Up to 4 FXS/FXO/BRI Ports; Up to 1 GSM/3G/4G Channel
Voice Codecs: G711 (alaw/ulaw), G722, G726, G729A, GSM, Speex, ADPCM
Power Supply: DC 12V, 1A; Power Consumption 1.8–10.6W
Form Factor: Desktop (160 × 160 × 30 mm); Weight 0.3 kg
Key Specs: Yeastar S20, 20-User IP-PBX, 10 Concurrent Calls, 2 Module Slots, FXS/FXO/BRI/GSM/3G/4G Modular, Linkus Softphone, Auto-Attendant (IVR), Call Recording, No License Fees
Usage: Small Business PBX, Branch Office Telephony, VoIP Migration from Legacy PBX, Small Call Centers