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◆Intranet free communication: IP phone and pbx in Shanghai headquarters, IP phone in American branch office, Shenzhen Factory, HK branch office can all be registered to IPPBX in Shanghai via internet using FXS/FXO port gateway. Fxo port gateway in four other places can also be registered to IP PBX with the combined use with local PSTN number. Since IP PBX support dynamic IP address.

◆Seat call centre establishment: Enterprise can establish call seats according to different departments. Such as sales group, tech group, and finance group etc. IP PBX user can self-define the call group name, add or lessen the quantites in each call group.

◆So-called call center: After finishing registeration, you can free the call between the branches through management of IP PBX in Shanghai. Four other places’ users, while dialing local PSTN number, calling users from the same VOIP carrier or intranet webphone users, can use a small and short number belonging to IP PBX. Since they can enter the IP telephone exchange to find the needed call group via voice prompt. With this solution, only local call charge or even free of charge, can the enterprise users enjoy call service worldwide with the most conveinence.

◆Call from outside: Other network telephones or the web phones belong to the same VOIP operator can dial Shanghai headquarter IP-PBX via VOIP operator (The inner net number divided to the IP-PBX by the VOIP operator). After hearing the voice of “hello, this is ⅹⅹcompany, please dial the extension number”, please continue to dial the extension Web Phone affiliated to IPPBX of Shanghai, Shenzhen Factory, HK branch office and American branch offices. Four other places’ users, while dialing local PSTN number, calling users from the same VOIP carrier or intranet webphone users, can use a small and short number belonging to IP PBX. Since they can enter the IP telephone exchange when you hear “hello, this is  ⅹⅹcompany, please dial the extension number” , please continue to dial the extension Web Phone affiliated to IPPBX of Shanghai, Shenzhen Factory, HK branch office and American branch offices.

◆Intranet call out: All extension belonging to IP-PBX can dial common telephone through IP PBX upper level VOIP carrier. Four other places’ extension can dial FXO port gateway, when the call is put through, local call is connected and long distance call path is avoider. Thus, long distance call is changed to local call.