One company had internal communication problems with branches in 7 different countries and it was costly.
A company should be able to hold FREE calls with its own branches, even if it is international. For this reason, IP Telephony systems should be used which allow communication over internet instead of normal telephone infrastructure. Each branch of this company was established an IP exchange and interconnected with IP plants in other companies. Each user was given a short code number in a specific order. In this way, users can make free calls to any user anywhere in the world connected to this IP Telephone network within the company.