IP PBX for 60 users, with the possibility of 15 simultaneous calls, the possibility of recording calls, router functionality, WiFi access point functionality, etc.
60 SIP users, 15 concurrent calls 2 FXO IP/SIP Failover Multiple SIP trunks Fax over IP (T.38 and Pass-through) Built-in VPN server/client TLS / SRTP security
Full VoIP Features
Call Recording Voicemail Call forking Auto CLIP Fax to Email Black/White list Auto Attendant Conference Call
Solution_4G LTE Solution.pdf 
UC120_2.55.3.zip