Scenario: Remote ip phone in customers house. Phone system at place of business. We are being told the system needs three ip address to work.

Question: 1.Why do you need three ip addresses? 2.How many of them are needed for the ip phone to talk to the phone system and function properly? 3. Could any of the ports that need ip addresses be on the public side that need outside access and leave the ones that dont on the private network?

Any help would be appreciated guys!