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physical setup for VOIP equipments

Explain how to get voip connections for a large enterprise,what equipments needed in customer side,how about the physical connection.intial setup,installaton of VOIP equipments.....like EPBX,IPBX,Router,IP phone....etc

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Re: physical setup for VOIP equipments

For Enterprise, CallManager will be used and it's a question of how many servers and what model. CallManager can handle 30,000 lines per cluster. IP Phones are typically models 7911, 7941, or 7961. The connection to the PSTN usually is ISDN PRI terminated on 3800 or Catalyst 6500 with a CMM. Unity is used for Voicemail and can handle 7,500 users per server.

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