1. 1 Ameren’s Telecommunications Strategy Enabling the Utility of the Future Apr 6 th, 2016

2. 2 STRATEGY ALIGNMENT Operating PerformanceFinancial PerformanceThought Leadership Engage all Business units to identify best practices and opportunities for Synergy and build accountability Transform the infrastructure and workforce to support greater reliability and performance Deliver value by investing in a transformation journey to lower OPEX expenditure Advanced Data Communications Distributed Generation, Micro grids, Energy Storage & Grid Automation A A B B C C Ameren’s Corporate Strategy is the guiding principle for Building a Network & Organization that enables the following strategic technologies: Strategy

3. 3 Over 1500 of Ameren’s communications circuits supporting operating technologies rely on public carriers. Most of these circuits are serial links which the carriers will reach end of life by 2020. Dramatic growth in networking requirements (Internet of everything utility) Increasingly more stringent requirements for NERC-CIP compliance Lack of well defined and open industry standards Ability to align wireless communications and available spectrum to ensure reliable and secure communications Lacking well defined performance metrics and data analysis of communications network aligned with our business (i.e., industry standard metrics) Constantly changing cyber security requirements The ever increasing demand of Carriers for pole access, insufficient means to recover costs, and missed business opportunities The aging of everything (workforce, infrastructure – technical debt) and the changing skills requirements. OUR CURRENT CHALLENGES

4. 4 “AS-IS” INFRASTRUCTURE ILLUSTRATION OF OUR CHALLENGE Telecommunication connectivity use cases for Generation, Transmission, Distribution, Distribution Automation, Metering and Field Workforce showing the architecture tiers, connectivity options and technologies

5. 5 HIGH-LEVEL STRATEGY AND VISION Eliminate dependency on carriers by moving to a mostly private network Lower overall operating expenditures through capital investments Implement a robust Wide Area Network (WAN) backbone utilizing Optical Ground Wire (OPGW) Provide standardized and aggregated backhaul communications for distribution automation and metering (private LTE) Standardized mesh networking solution for metering and micro-grids Provide a segmented network solution based on business requirements for reliability, performance, and cyber security Establish capabilities of networking technology to support “Smart Communities” through pilot projects Expanding the mobile workforce abilities

6. 6 “TO-BE” OVERALL ARCHITECTURE ILLUSTRATES OUR VISION The architecture changes that would occur between the as-is and to-be are highlighted using callout boxes. Implement Converged, IP Based Networks based on newer technologies Move from separate connections for EMS/SCADA and IT traffic onto a single IP based connection at the substation as allowable by regulatory requirements and security risk. Implement QOS / Traffic Shaping Provide guaranteed service to critical traffic through QoS packet tagging to prioritize critical control traffic from corporate access traffic on converged networks. Integrated Network Operations Integrate network operations based on standardized processes, integrate tools to provide a common view of the network and organizational support where required. Broadband support for field workers Leverage next generation broadband wireless networks and next generation field force mobile devices that can leverage both P-25 networks for mission critical voice and 4G networks for broadband data Leverage Substations connectivity for other field applications Substations connectivity can be used to aggregate field area traffic from gas, electric, and metering devices or as a jump off point to provide connectivity. Security mechanisms will be in place to logically segment field area traffic from substation traffic. Create Standardized Substations Communications Hub Implement IP based LAN within substation to support integration of multiple applications. Security mechanisms will be in place to logically segment traffic types on LAN.

7. 7 To building a robust backbone The Backbone will connect most of Ameren’s Transmission substations, larger works headquarters and office complexes in Decatur Ill and St. Louis MO. Ameren will be deploying over 4500 miles of fiber. Standard design will include mast in each substation for network aggregation of backhaul communications. Backhaul and field area networks Current pilots being conducted. –April 2016 transition St. Louis metro south distribution SCADA form existing 900 MHz MAS solution which has become saturated to a mesh network with a cellular backhaul –Pilot QoS on public cellular network in downtown St. Louis for underground assets. –Gigabit Passive Optical Network (GPON) for smart street lighting capabilities, allows Ameren to understand and demonstration FTTx –Building a mesh network in a rural area of the Missouri Ozarks to extend the reliability and reachability of the network supporting distribution automation and distribution SCADA, using a cellular backhaul where services don’t exist AMEREN’S APPROACH

8. 8 Shows the St. Louis Metro south network reimagined to use meshing type radios, a few repeaters and a single backhaul from a higher location. This application works well with substations and Distribution Automation assets. Trending has shown that M2M communication is increasing in between substation and DA. These networks keep that traffic local and resilient. If deployed today, this network would backhauled using conventional MAS, but in the future could be backhauled via LTE. Another benefit of this packet radio technology is that multiple applications can be placed on it. Currently, at distribution subs, a cellular relay access modem is installed along with a MAS radio. Several sites could bring all the relay access data back to eliminate the need for a cell modem at every substation PILOT – ST. LOUIS METRO SOUTH

9. 9 PILOT – RURAL OZARK DISTRIBUTION Shows the value of bringing communications to locations that are difficult. Multiple repeaters can be installed to run the data from a location with backhaul to another isolated location. As seen in the Metro network relay access and SCADA can be backhauled into the same network. A bonus goal of this deployment is to also pick up the Transmission SCADA, a third data flow on network, to eliminate the risk of the 4 wire circuit. This circuit, as are many others, in danger of being cut off either formally or informally (by not repairing in timely fashion) before our fiber deployment reaches them. Since cellular doesn’t work at this location, the mesh radio network becomes our backup opportunity.

10. 10 Operation Technologies Assess technology capabilities to support the MPLS network –RTU compatibility, upgrades, or replacements –Protective Relaying, Pilot work operating in a MPLS network - completed –Cyber security –Maintaining NERC CIP compliance Facilities –Structures and poles capability to support new static wires –Facilities; space, grounding, and security – Adding masts for field device backhaul New research is required Ability for cellular carriers to support distribution assets with QoS Private Cellular capabilities Utilizing open and industry standards for interoperability (i.e., LTE for private and public) Ameren Innovation Teams New initiatives for distributed generations LED light programs and multi-use networks Metering upgrades in Missouri CHALLENGES TO OPERATIONS

11. 11 WiMax is no longer top tier choice for next generation FAN needs: All major carriers have dropped this technology from their networks (T-Mobile, Sprint, etc.) Ecosystem of devices is coming to a halt –Ex: GE is not developing any 3.65 in new Orbit platform, Mercury WiMax radio has been depreciated to the internal GE support only division Spectrum environment in 3.65GHz is no longer favorable with recent FCC ruling (though still workable), SAS workability for after 2020 grandfathering period unclear WiMax is still an option for niche applications, but isn’t the best choice to be workhorse of IoT Utilities need a platform that can handle the provisioning of a great number of devices for a variety of applications. This same network must handle very low bandwidth apps as well a larger ones. LTE meets these requirements. The entire LTE concept was designed for carriers to incrementally upgrade their networks, vs rip and replace. Provisioning devices could be done quickly and cheaper to meet internal customer demand Technology benefits from a vast ecosystem of base station and handset hardware –Cost of LTE chips continue to decline –Estimates of 200kHz channel, $4 chipset in next 2-4 years make metering or other apps look attractive compared to traditional RF mesh –Why pay $3500 for a P25 handheld radio? What would it cost to harden a $500 iPhone? More skills and talent pool of engineering to draw from for deploying networks LTE supports networking features utilities are looking for –QoS, MPLS, VoLTE FirstNet network will deploy using LTE –Even if utilities don’t participate, they will benefit the contribution to ecosystem of devices LTE architecture is no longer physically complicated –Evolved Packet Cores (head end control) can run on one server –eNodeBs (base stations) can look like WiFi access points Utilities have a couple of options –Pool multiple utility resources and buy spectrum –Go it alone –Lease new 10MHz of spectrum from ATT (need more time to evaluate) AMEREN’S POV FOR LTE