SOHO IP-PBX with POTS, GSM and VoIP Connectivity • Built-in Ports: 3 CO and 12 TDM Ports, 10 SIP Ext, 8 SIP Trunks • Max. IP Users: 50 • Optional Interfaces: VoIP Server, GSM, Voicemail, 50 SIP Users, 8 SIP Trunks • Power Supply: External Adaptor – 24VDC, 2.5A • Auto Attendant, LCR, Multi-party Conference, LDAP Client, COSEC Door Integration, Mobile and PC based UC Client, etc. Note: ETERNITY NE VS is required for IP functionality.