Nowadays the popularity of Internet, the advantage of technology and the growth of business have a great influence on the enterprises' business models. Applications over the Internet also provide a variety of services over IP communications for every enterprise. As a result, most enterprises started setting up more branches at different locations to increase their sales. This invisibly increased the amount of audio communications between the headquarters and the branches. However, video conferences and message chatting have also become indispensable in the development of communication network of enterprises. The IP-based communication networks, VPN utilization and cross-branch communications that IP Centrex provides successfully reduced huge cost of internal and external phone bills by outward connections to IMS systems and by integration with mobile networks which provide communications like enterprise audio services, video services and messages chatting. In the past, enterprises often spend a huge amount of cost on purchasing software/hardware equipment to integrate their audio systems and IT systems. For now, the communication networks of enterprises can easily process the exchange of data by deploying IP-based communication networks. The cost of equipment is therefore saved. For now a new lesson for the enterprise has become how to improve enterprises themselves to increase competitiveness and get closer to their customers. This article introduces inward communication networks of enterprises and the evolving of the IP-based network of telecommunication companies. Moreover, it has solutions of application services for enterprises which have deployed IP-based networks. For an example, one enterprise can based on its IP PBX and develop application services such as E-Mail, Company Website, ASR, and TTS. In the end, real examples are given to explain this solution is capable of meeting the requirement of enterprises with the most practical customization design and integral services, which indeed strengthens competitiveness.
ADSL (Asymmetric Digital Subscriber Line DID (Direct Inward Dial) E-Mail (Electronic Mail) FTP (File Transfer Protocol) FMC (Fixed Mobile Convergence) HTTP (Hypertext Transfer Protocol) HTTPS (Hypertext Transfer Protocol Secure)