Go back to 642-415 - UCAD - Unified Communications Architecture and Design Exam

Question :-

In a TDM PBXto Cisco Unified Communications Manager migration, which three things must be verified from the LAN perspective before IP telephony can be deployed? (Choose three.)
the type of wiring in the office
the number of PSTN connections needed
the number of public IP addresses available
the amount of rack space in the equipment rack
the amount of power that is available to support new LAN switches

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