Specifications include, but are not limited to: 2.2. Vendors must provide a detailed Operational Plan that describes how the proposed solution will be delivered and managed. 2.3. Vendor must describe in detail the post-implementation support plan that will be provided to APS for all services requested in Section 2.1 above. 2.4. All regular classrooms and administrative facilities are wired for voice, data, and video with all having Internet capabilities. Internet web filtering is being done by Palo Alto firewalls at Crim Center for Leadership and Learning and Digital Realty. The current school-based enterprise network is a star topology comprised of MPLS fiber circuits connecting back to Digital Realty and the APS Data Center. There are currently about fifty thousand (50,000) endpoint devices on the APS network with access to the Internet. In addition, the District has about four thousand (4,000) IP phones running on Cisco Unified Communications Manager version 11.5.1.16900- 16. SIP services provided by the vendor must be certified compatible with the APS voice system. 2.5. APS will be asking for pricing for twenty (20) Gbps circuits. It is APS’ intent to select the twenty (20) Gbps option for year one. APS reserves the right to increase to thirty (30) Gbps or higher at any time during the contract period if the utilization justifies the increase. APS will provide a minimum thirty (30) day notice to the vendor requesting such a change. The successful vendor shall provide seamless access to the business critical Internet connection on a mutually agreed upon start date. The successful vendor will provide the technical resources necessary to assist APS in migrating or upgrading critical business functions from the current ISP to the new ISP circuit if necessary.