With the continuous enhancement of requirements for communications and the increasingly sophisticated of technical means, more and more means of communication become available, many of which are new technologies and means, such as instant messaging, desktop and mobile video communication, IP wireless voice and so on, while a lot of traditional means of communication, of course, still occupy a certain market share, such as analog phone, and stored program-controlled telephone switching system (PBX) based on traditional TDM switching.

The client is one of the global-leading institutions with regards of auditing, taxation, financial transaction and advisory service. For such enterprise user which needs more efficient business communications and lower communication costs, it is favorable to make organic and intelligent integration and unity of the original various means of communication, i.e. a variety of existing and future means of communication and technology are to be centralized in a unified interface for intensive use.
  
On account of the practical application needs for the telephone system of the client, and the aim to change the client’s original traditional PBX program controlled switching system which is a single point of failure, and has shortcomings such as difficult to maintain, high complexity, inconvenient expansion, etc., the unified communication solution of Cisco Systems is recommended by Rich Cloud Technology. It can subtly confluence and integrate fixed-line telephone, mobile telephone, e-mail, voice message, instant messaging, audio and video conferencing, and other types of means of communication. Through such integration of various communication tools, network service and mobile devices for unified user experience, the employee, client, partner, etc. are united together in a new and intelligent way, thus help users improve business process and innovative business models, enhance production efficiency, and establish a unique competitive advantage for the enterprise.
   
The deployment of Cisco unified communication system brings many advantages for the enterprise IP telephony system, mainly in:

• Dual CallManager redundant IP telephone switch to ensure the high availability of telephone system

• Unity VoiceMail system providing automated attendant and voice mail service

• Internet telephony saving the long distance charges, and WAN network for telephone and data communications between the branches

• Using Force Authentication Code to achieve long-distance telephone call control

• A variety of conference call mode to improve the efficiency of the communications among employees

• Support the use of foreground manual Attendant Console in conjunction with automated attendant

• IPMA, Extension Moblity, personal phone book and other services

• Restrict the use of special numbers (e.g. 17909)

• Using Multi Level Administration to achieve hierarchical management

• Using IP telephony long distance telephone billing system

Related solutions： Overview of uniform communication | Wireless Network