Specifications include, but are not limited to: The objective of this Request for Proposal (RFP) is to replace the current telephony systems in the district that are POTS (plain old telephone service) or PSTN (public switched telephone network) technology with an in-house, locally hosted Voice over Internet Protocol (VoIP) technology solution. A small number of locations have a Cisco based VoIP technology that is on premises and the desire is to migrate these sites into the same solution if possible. For the scope of this RFP, the intent is to replace only devices that currently exist without increasing the number of handsets or lines; however, the winning solution must be able to expand when/if the district later decides to include every classroom.