AGE 59 COMMITTEES None BRUCE W. MCCLELLAND Non-Independent Director Director since March 2020 BACKGROUND Ribbon Communications Inc. President and Chief Executive Officer, responsible for the strategic direction and management of Ribbon (March 2020 to present) CommScope Inc. , a global network infrastructure provider Chief Operating Officer, responsible for the combined portfolio of products and services (April 2019 to August 2019) ARRIS International plc ( ARRIS ), a telecommunications equipment manufacturing company Chief Executive Officer (September 2016 until its sale to CommScope in April 2019) served in numerous leadership roles during 20 years at ARRIS and managed the successful acquisition and integration of the Ruckus Wireless and Brocade ICX Campus switching business from Broadcom Inc., a major step in diversifying the ARRIS business beyond the service provider market into the broader enterprise market, while strengthening the company s wireless technology capabilities ARRIS (cont d) held several other roles at ARRIS, including President of Network & Cloud and Global Services (April 2013 to August 2016) authored several communications- related patents Nortel Networks Corporation and Bell Northern Research ( BNR ) served in leadership roles for eleven years began his career with BNR in Ottawa, Canada, responsible for the development of Nortel s SS7 switching products immediately prior to joining ARRIS EDUCATION B.E., the University of Saskatchewan SKILLS AND EXPERTISE We believe Mr. McClelland is qualified to serve on the Board due to his executive leadership experience, including as a chief executive officer of ARRIS, along with extensive operational expertise and experience in engineering.