SOHO IP-PBX with POTS, GSM and VoIP Connectivity • Built-in Facilities: 4 CO and 2 TDM Ports, 50 SIP Extensions,50 SIP IP Subscribers, 50 VARTA Users, 8 SIP Trunks, 4 Channel of Voice mail SARVAM VMS SOHO, SARVAM CTI SOHO, SARVAM SMS GATEWAY, SARVAM SMS SERVER • Optional Interfaces: GSM Module • Power Supply: External Adaptor – 24VDC, 2.5A • VoIP Server (Built-in), Auto Attendant, LCR, Multi-party Conference, LDAP Client, COSEC Door Integration, Mobile and PC based UC Client, etc.