VoIP technology enterprise LAN network approach to explore

1 Introduction

The use of VoIP technology, through technical integration, traditional enterprises with traditional PSTN voice LAN data services combined to enable them to achieve in a network of low-cost IP voice and IP data services, which enhance the enterprise LAN network of non-IP call processing capacity, to expand its use of function, reduce the external costs of doing business (a large number of long-distance telephone, fax, video conferencing, voice, multimedia network information services, etc.) have a very important practical significance.

Traditional enterprise LAN itself does not have to non-IP voice switching functionality, PBX systems are not equipped with the same IP data exchange, allowing PBX and LAN network system between the two independent of each other, can not directly mutual visits, network bandwidth and speed can not be further The fully tapped and utilized, limiting most new enterprises, a large number of multi-media business information needs. Under such circumstances, the proposed VoIP technology applications in the enterprise network environment under the conditions of the issue of technology integration. However, with the commercial network of VoIP technology is different, enterprise LAN network by a dedicated and strong, the expansion of poor performance, which constitute the situation more complicated, there will be an enterprise Intranet in accordance with different circumstances, to consider the feasibility of the implementation of VoIP technology.

2 traditional enterprise networks and the application of VoIP technology

In most cities, then the existing telecommunications PSTN City Council, the PBX switching system with enterprises as the equivalent of city council if a client access to the city Board PSTN systems, PBX switching system so that enterprises occupy PSTN telephone relay system, an independent Board to and a number of relay number of resources to the enterprise by a certain percentage of traffic assigned to concentrate市话网connected with the trunk. This is in fact based on a traditional physical port or circuit-switched form of a fixed connection, it must make every PBX extension users with a physical switch ports associated with the user changes location, the user cables physical configuration must also change accordingly, which makes network scalability and flexibility of system configuration by a lot of restrictions, thus enterprise VoIP network hopes that with the integration of technology to solve this problem.

VoIP in the enterprise-class system, the connection between the terminal equipment is mainly based on the logical network structure, based on the circuit can be connected to physical port corresponds to the number of logical ports, the number of logical ports by Sekimori definition, equipment IP address according to the logic of information identification, through the form of packet switching, not only from the PBX can also be the first to voice TSI isolate voice signals and call control signals to the LAN data network to achieve the figure of the voice signal conversion and transmission at the same time, You can also call the server's IP address of the equipment to manage (add, delete and modify), so users in the network expansion or change, no need to switch physical port configuration, only the logic of some or individual ports to redefine or IP addresses can be modified. For example, users can insert the phone any available network port, the network of the Telephone IP address to identify users, rather than need to know the specific location of the phone. Therefore, based on the definition of logical network structure and connectivity, as a LAN network traffic through the redistribution of a new approach, in the IP PBX equipment can be completed at the same time the exchange of data and voice, to realize in a LAN network to establish low-cost, voice value-added business services.

Commercial networks and VoIP is different: the enterprise network, in considering the VoIP technology, it is necessary to consider the different needs of voice and data transmission requirements of real-time using VoIP technology to determine suitability; the network using the existing structure to determine which types of VoIP access forms, IP transmission network design how much traffic (involving network congestion and packet loss and other priority issues); a full understanding of the tender of the program suitable for a variety of VoIP gateway equipment (independent network Guan, routers, gateways, remote access servers (RAS) gateways, IP PBX Gateway) and agreement (H.323/H.245 or SIP) compatibility and other issues; according to network calls the largest possible number of and equipment of the information processing ability to forecast the demand for network bandwidth, determine the appropriate port number; specific understanding of each of the IP packet gateway devices encoding, compression methods and prioritize the way (the impact of delay of three factors), and to consider whether there is a need as Sekimori Gateway management software such issues, so as to maximize the realization of the system to develop the design features and equipment to minimize the cost of the investment. To this end, according to the enterprise network with different situations constitute a form from the network could be attributed to the following several easy to integrate enterprise-class solutions.