Implementing SHAKEN: You are ready to sign calls, now what?


Implementing SHAKEN: You are ready to sign calls, now what?

February 25, 2021

To address the flood of illegal robocalls with spoofed numbers, the STI-GA, an industry-led body, has set up the SHAKEN ecosystem so that service providers can obtain the digital certificates they need to sign calls and authenticate caller ID in accordance with the SHAKEN standards.

Now that you’ve joined the ecosystem and obtained your STI certificate, you’re almost ready to sign calls, but you still have some questions.  How can I be sure a call should receive A-level attestation?  Will A-level attestation guarantee a green checkmark? Will calls with lower levels of attestation be blocked?  How do I know other SPs will accept my signed calls? Are there best practices to follow?  We will deliver insight into these questions in the last of a series of webinars.

This webinar will help service providers understand how to work within the SHAKEN ecosystem.  It will discuss best practices for call attestation and how to avoid revocation.  It will advise service providers on the proper use and treatment of certificates to ensure the integrity and security of the SHAKEN ecosystem.


Linda Vandeloop

STI-GA Board Chair
AVP External Affairs/Regulatory
AT&T Communications

Linda Vandeloop has over 30 years of experience in the telecommunications industry.  Linda has held a variety of positions at AT&T, primarily in the Regulatory and Financial Management organizations.  She currently works in AT&T’s Federal Regulatory organization in the Washington D.C. office.  In her current position she is responsible for consumer and accessibility federal regulatory issues.  Linda began her career in California at Pacific Bell in the Financial Management organization responsible for revenue forecasting and financial analysis of regulatory issues.  She has a Masters of Administration Degree and a Bachelor of Arts Degree in Economics from the University of California, Davis.

Glenn Clepper
STI-GA Board Vice Chair
Director Regulatory
Charter Communications

Glenn is currently Director of Regulatory for Charter Communications and serves as the STI-GA Board Vice Chair.  Glenn has over twenty-five year’s telecom professional experience.

Glenn represents NCTA – The Internet & Television Association, on the Secure Telephone Identity Governance Authority Board.  He is a member of the North American Numbering Counsel member and former Co-Chair, where he jointly led the Local Number Portability Administration Working Group.  Glenn has also collaborated in various North American Numbering Counsel working groups including the Nationwide Number Portability Issues, Reassigned Number Database, Call Authentication Trust Anchor, and Interoperable Video Calling Working Groups.

Martin Dolly
STI-GA Technical Committee Chair
Lead Member of Technical Staff

 Martin Dolly is an AT&T Lead Member of Technical Staff, currently assigned to the Core & Government/Regulatory Standards organization. Martin has been with AT&T Bell Laboratories/AT&T Labs for 31 years, where his areas of expertise being in security, signaling, and services, particularly Government Priority Services.

Martin has contributed to many of AT&T’s SIP deployments since 2000. He is co-author of 5 IETF RFCs and contributed to many others. He contributed to and lead efforts on ISUP to SIP interworking including those in 3GPP, i3 Forum, ITU and ATIS.

Currently Martin is a driving force behind IP Interconnection, co-chair of the ATIS-SIP Forum NNI Task Force where is also the editor and major contributor to the IP NNI Profile standard.  He is also a co-chair of the STI-GA Technical Committee.

Chris Wendt

STI-GA Technical Committee Vice Chair
Director, IP Comms & RTC Solutions

Chris Wendt is currently Director, IP Comms & RTC Solutions at Comcast. For much of Chris’s 20+ year professional career, he has been involved in multimedia communications, from early work at Bell Labs on DSP algorithms for 3D positional audio and low-bitrate voice codec work using the MBone VoIP network, to RTSP streaming of MPEG-4 video, audio, and 3D facial animation, to his current work with Comcast on one of the largest current deployments of IMS/SIP and latest focus on RTC-based next generation communications and applications.

Chris is currently a co-chair of the ATIS/SIP Forum IP-NNI Joint Task Force, co-chair of the STI-GA Technical Committee and follows closely activities in the 3GPP, IETF and W3C. He holds a BS in Music, and a BSEE, and MSEE from Drexel University in Philadelphia.


Brent Struthers

STI-GA Director

After leaving the radio industry behind, Brent began his career in telecom working on telephone numbering issues for the Illinois Commerce Commission. In that role, he managed the Local Number Portability Trial, the FCC’s national field trial and he also helped develop and oversee the nation’s first number pooling trial in Chicago.  Brent joined Lockheed Martin, now Neustar, in 1999 as state government liaison, serving in that role for almost 20 years.  Now working as ATIS’ STI-GA Director, Brent is solely focused on helping the industry implement SHAKEN in order to mitigate illegal robocalling and caller ID spoofing. Brent and his wife, Mercy, have been married for 23 years and have two college-aged children.