OfficeSIP Server 

Enable the empolyees of the same company to call each other for cooperation and joint project management. Work with multiple options for intra-office and inter-office calling, issue permissions, include and exclude users, manage complaints and hardware connections.

OfficeSIP Server is a simple and efficient application that allows you to use regular telephones for intra-office and inter-office calling without paying. OfficeSIP Server is designed for instant messaging, enabling VoIP communications in SIP-compliant software and hardware clients.