At present, the numerous enterprises along with the service expansion, have opened the massive Branch office, between such enterprise total Branch office as well as Branch office’s pronunciation communication is very frequent, the enterprise long-distance telephone call expense is in an enterprise cost of operation huge expenditure. Now the Internet has been popular, nearly each enterprise and the Branch office have the Internet turning on. Therefore draws support from the existing Internet to realize the network telephone, helps the company to save the long-distance telephone call cost, becomes company’s important choice day after day.
Traditional telephone network PSTN (PublicSwitchedTelephoneNetwork, public exchange telephone network) by the circuit switching way transmission pronunciation, main is called both sides through to establish a real-time real circuit connection to carry on the telephone conversation. VOIP (Voice Over IP) the technology as transmits the platform take the ip packet switching network, to simulates the voice signal to carry on the compression, the pack and so on a series of special handling, enables it to be possible to use the connectionless ip integrated data package to carry on the transmission.
Along with the wide band popularization, the VoIP networking’s maturity, realizes plan diverse, market produce rich, the small and medium-sized enterprise should also follow close on the time footsteps in this aspect, deployed that own VoIP system, realizes the voice communication, is the long-distance voice communication use specially, similarly may obtain the considerable income from VoIP. Deep cuts the enterprise existing interior network resource and the use Internet resources is the small and medium-sized enterprise network application fresh target.
The equipment shaping and realizes the plan
At present the IP on-line pronunciation technology and the standard were already mature,
Has obtained the widespread application, involves product including the VoIP gateway, IPPBX (IP telephone switchboard or IP group telephone), PCPBX (based on PC server’s small IP telephone switchboard).
VoIP gateway
VoIP gateway its leading role is completes the simulation voice signal and between the ip data signal interconversion, gets up “adaptive” the function, the ordinary telephone simultaneously connects the original PSTN net and present’s IP net, on demand wants to choose the simulation telephone and the IP telephone. The VoIP gateway provides traditional the pronunciation connection, with the enterprise existing telephone switchboard (PBX) or the group telephone connection, the VoIP gateway application’s main feature is the full use existing network resource, saves the user the long-distance phone bill, and unifies with enterprise existing tradition telephone switchboard (PBX) or the group telephone, may shift gradually the traditional pronunciation telephone to the IP telephone on. The VoIP gateway product takes one kind of mature IP telephone solution, at present also obtains the popularization in the Major industry. But some small VoIP gateway product appearance, also will give the small and medium-sized enterprise user to bring the enormous advantage, this kind of product can provide 1 group, 4 generally group or 8 group telephone relay connection, simultaneously will provide the simple routing function and the network interface, can conveniently the enterprise Branch office’s telephone switchboard or the group telephone through the IP network connections.
Plan: Simulates the telephone pronunciation gateway net to defend PBX
The VoIP gateway’s application is VoIP the pronunciation gateway’s FXO/FXS connection with the headquarters either Branch office’s PBX (private branch exchange switchboard or group telephone) direct connected, when needs to make the long-distance telephone call, changes to the VoIP gateway the voice, transmits through the Internet. User when use only need allocate the first IP telephone on the extension telephone to take the number (for example to be possible especially to suppose is ” 8 “), then may dial the IP telephone directly.
In this plan, if the ordinary call such digit number digit dialing, must defend likely after the net route management, but is too expensive regarding small and medium-sized enterprise this kind of equipment, we can only borrow the hypothesized telecommunication operation company’s net to defend realize, otherwise can only dial the IP number. The net defends is in high-level, provides to the vertex call management function, is in the IP telephone network system’s important management entity. The net defends the major function includes: Address analysis, access control, band width management, region management and so on four basic functions; In addition, but can also provide the call to control the signaling, the call management and so on other functions. Must construct one stably reliable, the practical VoIP net, cannot leave GK the management.
IPPBX switchboard
IPPBX (network telephone switchboard) is one kind based on the IP telephone exchange system, it has traditional PBX switchboard’s all functions, its goal substitutes for enterprise interior original PBX. This system may integrate completely the voice correspondence in company’s data net, thus establishes can connect distributes from all over the world the work place and staff’s unified voice data net. The IPPBX most remarkable characteristic is an integration communications system, therefore, through the Internet, only needs the sole equipment then to provide the pronunciation, the facsimile, the data and the video frequency for the user and so on many kinds of mailing addresss, establishes medium, the small call center. Because the VoIP technology is carries on the pronunciation by the data packet form in the IP network the transmission, therefore uses IP-PBX the construction in the VoIP platform, the user has the transportable characteristic, said vividly what is the identical user in A with is 011 numbers, to B was 011 numbers, the number walks along with the human, IP-PBX also supported the pronunciation mailbox, in every way the conference, the video frequency conference and so on traditional PBX no functions. Is helpful and different coordinates the work in the motion work. IPPBX is also the direction which the IP telephone develops.
Plan: VoIP telephone /IP telephone IPPBX PBX
IP-PBX has developed the practical Yi Yong system in view of the small and medium-sized enterprise. It namely inserts namely includes with the speech network solution: Products and so on IP-PBX, SIP telephone and software telephone.
The enterprise lays aside IPPBX respectively in the headquarters and the Branch office, the enterprise internal personnel may use the IP telephone perhaps simulate the telephone to connect on ordinary different IPPBX. Regarding commercial public figure who travels on official business frequently, may use SIP the software telephone, realizes the motion telephone conversation through the notebook.
IPPBX both may through the connection card and the traditional PSTN telephone connection, and may connect through the GateKeeper hypothesized operator. In does not change the existing digit dialing custom in the foundation, realizes telephone phone bill which the nimble connection and gives preferential benefit.
If in the company all total, the branch unit is on use fixed public network IP the Internet, total score unit’s IPPBX may realize “point-to-point” the correspondence through IP to IP, was also can find both sides. What if uses was fluctuation IP, IP changes unceasingly needs to defend (GateKeeper) through the net to carry on the address to analyze, fluctuated the IP foothold when IP will change carried on the notice movement which to GateKeeper IP renewed. If the IPPBX integration has the net to defend or has the net to defend the module to be possible to increase, that net defends may by the enterprise in the Base company hypothesis, if does not have, then needs through to register the GateKeeper hypothesized operator to solve. Generally provides the IPPBX equipment’s factory to have the possibility from to suppose GateKeeper for the customer service, also possibly subcontracts gives specially the hypothesized operator.
Therefore this plan turns on Internet’s majority domestic small and medium-sized enterprise in the ADSLPPPoE digit dialing, needs GateKeeper to solve the dynamic IP machine address ma analysis problem. The following plan may use GateKeeper similarly to solve the dynamic IP problem.
PCPBX
Based on IPPBX switchboard’s platform, although stable, but the price is expensive, scale small and medium-sized enterprise possible unacceptable. Along with market competition’s aggravating, the small and medium-sized enterprise also gradually realizes, although own call center scale is small, but similarly also needs to stabilize, the performance good system’s guarantee. Therefore, PCPBX arises at the historic moment, the field usually called that it “applies the server”. This kind of system uses the telephone board card based on the PC server to add the software alone (Asteri
sk open source code’s software VoIP the PBX system) realized PBX, the dial telephone reply (IVR), the automatic call to assign (ACD) and so on functions, is called the UnPBX call center.
PCPBX synthesized the VoIP gateway and the IPPBX characteristic, may use the existing telephone channel and the telephone, uses the VoIP board card to realize the cross IP network long-distance telephone call. The PCPBX product has provided the nimble development leeway for Small and medium-sized enterprise and the work Branch office future development, causes to be in the growth the small and medium-sized enterprise to be able to obtain the function rich IP correspondence, and does not need the soaring expense cost.
Plan: IP telephone/simulation telephone PCPBX PBX
The construction system takes based on PC server Asterisk the call management software’s PCPBX in the headquarters sets up the internal IP telephone network the control center (PCPBX). This control center by the software way work, installs in a server. Uses the digital relaying gateway and the original PBX E1 relaying connection unites, the gateway provides the multi-channel digit establish as the relaying pattern, a gateway end connection special network. Carries on the assignment on control center’s server to the IP telephone number, or carries on the hypothesis to the original extension telephone telephone’s digit dialing way. May complete the IP telephone system’s construction through the appropriate readjustment control center software’s parameter.
Installs the IP telephone or the pronunciation gateway in various Branch office; According to the physical demand is the IP telephone, the pronunciation gateway disposition public network telephone number.
This plan is simple besides the installment and the disposition, but also has the good extendibility, in the band width permission’s scope, installs the pronunciation gateway directly and assigns the number, has realized the telephone dilatancy immediately. At maintains in the original PBX numbering scheme invariable situation, in the system talks over the telephone only need dial the extension telephone number.
Summary:
Although realizes the enterprise VoIP construction to have many kinds, but some plan’s system equipment composition structure is too complex, in addition is too big in the use custom with the ordinary call difference, does not have the endophilicity. , IPPBX the construction VoIP telephone system possible structure to be on the other hand more compact. It displays in: Originally PBX has the telephone management function it has, PBX no function may expand, for example: NAT, LAN exchange, VPN, firewall; IPPBX can provide the rich connection; May through the WEB way convenience management; Possibly has the net to defend the function is its big luminescent spot, makes the enterprise VoIP system’s construction to be simpler. Therefore, IPPBX should be present small and medium-sized enterprise realizes the VoIP system’s best construction.
