OnDO SIP Server, a SIP Registrar and Proxy Server, registers and authenticates users, and routes calls between user agents. The product has original NAT traversal (SIP NAT) functionality as well as flexible control routing functions. 

OnDO PBX is a software-based telephony system. It is SIP compliant and web-based for easy installation and management. Our PBX includes all the features of traditional PBX systems, such as; call transfer, call conference, call forwarding, and voicemail, and much more.