1. Dewey Day Principal OT Architect
Electric Protection over Carrier Switched Ethernet Services Pacific Gas & Electric
Dewey Day
Principal OT Architect

2. What We Did Before - 4 Wire Lease Architecture
SCADA Master and FEPs have Many Modems
Multiple Leases with No Aggregation Drives Up Costs
Many Multi-Carrier Leases
Lower Reliability
Extended Outages
Point-to-Point Leases
Difficult to Troubleshoot
Limited Monitoring Capabilities
Copper Cable
HVP Difficult to Engineer
Limits Bandwidth Growth
Safety Concerns
High Expenses Escorting Telco Techs

3. PG&E Lease Line Overview
1457 Facilities Served with Telephone Company Leases
Leased Functions
266 Energy Management System Leases
949 SCADA Leases
403 Protective Relaying Leases
146 SPS/RAS Leases

4. What We are Doing Now - T-1 Lease Architecture
Reduction in Modems at SCADA Masters and FEPs
Aggregation of Circuits Reduces Lease Line Costs
Fiber Entrance Facilities Improves Reliability of Leases
Reduced Multi-Carrier leases
Centralized Lease Architecture
Improved Monitoring
Reduced Outage
Migration to PG&E Infrastructure Reduces Lease Costs
Fewer Leases Reduces Complexity
Channel Bank Enables Growth
Fiber Entrance Enables Higher Bandwidth Services
Fiber Eliminates Safety Issues with HVP

5. What We Are Testing – Carrier Switched Ethernet
AT&T Private Line Decommissioning Page 5

6. Why We Think it Might Work….
Service Level Agreement from AT&T Switched Ethernet Service Guide