50 Users 25 Concurrent Calls Up to 8 FXS/FXO/BRI Ports Up to 4 GSM/3G/4G Channel | https://www.yeastar.com/s50-voip-pbx/
 Automated Attendant (IVR)  Attended Transfer  AutoCLIP  Blind Transfer  Blacklist/Whitelist  Call Back  Call Detail Records (CDR)  Call Forwarding  Call Monitor  Call Parking  Call Pickup  Call Recording  Call Routing  Call Waiting (FXS)  Caller ID  Conference  Custom Prompt  Dial by Name  DISA  Distinctive Ringtone  DNIS  Do Not Disturb (DND)  Event Center  Email to SMS/SMS to Email  Fax to Email  Paging/Intercom  LDAP  Mobility Extension  Multi-language System Prompt  Multi-language Web GUI  Music on Hold  One Touch Recording  Queue  PIN List  Phone Provisioning  Real-time Status Monitor  Ring Group  SIP Forking  SLA  Speed Dial  Time Condition  User Portal  User Permission  Video Calls  Voicemail