2025 Annual General Meeting Notice

Meeting Date: Tuesday, 18 August 2026

1 – Announcement: Annual General Meeting

Section 12 of the By Laws of the SIP Forum (the “Forum”) provides that the Forum hold an Annual General Meeting. In accordance with the By Laws, this document shall serve as official notice for the Annual Meeting of the SIP Forum to be held as follows:

1.1 – Date / Time of Meeting

The general meeting will be held:

Tuesday, 18 August 2026
1:00pm – 2:30 pm U.S. Eastern Standard Time
Via GoToMeeting. Login URL, Meeting ID and Optional Dial-In Number to be sent in follow-on message via the mailing list.

2 – Subject Matter for the Meeting

In the meeting, a review of the financial operations for fiscal year 2025 will be provided, as well as a review of the operational activities that have occurred since the last General meeting.

In addition, Full Members will be asked to vote on two items.

2.1 – Voting Items

Two official voting items are on the agenda:

• Election of New Board Members;
• Discharge of Board Member Liability;

Please note:

As the 2025 Annual General Meeting will be held remotely, via GoToMeeting, all Full Member Representatives shall submit their email ballot or fax or email their Proxy vote using the Voting Form Proxy document prior to the AGM.

Votes must be received from > 50% of Full Members in order to have a valid election, and in order to have a valid vote regarding the Discharge item.

The deadline described below for returning ballots via surface mail is Wednesday, 12 August 2026 and email is Friday, 14 August 2026.

3 – Board Member Elections

Members of the Board of Directors serve for two-year terms, with terms expiring at the general meeting that takes place at the end of this term. Elections for new board members will take place at this general meeting.

There are ten (10) Board seats opening this year. They include six (6) seats held by current directors John Ayers, Keith Buell, Greg Rogers, Harold Salters, Richard Shockey, and Steve Tang, whose terms are expiring; three (3) seats currently held by Mary Barnes, George Cray, and Clark Whitten, who are retiring; and one (1) seat that is currently unfilled.

In addition, the seats currently held by Martin Dolly, Phil Linse, Chris Oatway, Chris Wendt, and Richard Wikoff are not expiring.

3.1 – Voting Limits

Our current Bylaws require that a minimum of seven (7) and a maximum of fifteen (15) individuals shall sit on the Board of Directors, and that of the total of 15 members a maximum of seven (7) Directors may be Participant (i.e., Individual) Members who are not affiliated with a Full Member company on the board at any one time. Since the seats occupied by three (3) Participant Members whose terms are expiring, including John Ayers, Richard Shockey and Steve Tang; the two (2) Participant Member seats held by Martin Dolly and Phil Linse, whose terms are NOT expiring; and the two (2) seats held by George Cray and Clark Whitten are now open due to their retirement, up to five (5) Participant (Individual) Members can be elected/re-elected in this election.

You will be voting by expressing a preference order for candidates. This preference order will be used to tally the Directors who are elected.

3.2 – Who Can Vote

Each Full Member in good standing (i.e., with current term Full Membership dues paid) is entitled to a single vote on the matters being presented for a vote. Each Full Member has the right to vote electronically via email by using a proxy/voting form validly executed by the Full Member. A proxy shall be executed by written authorizations signed by the Full Member, giving the proxy holder the right to vote the vote.

Alternatively, Full Members not voting via email can utilize the proxy/voting form provided with this general meeting announcement package to use surface mail to submit their votes. The proxy/voting form provides a method to vote for the Director candidates, and grants to the Managing Director of the SIP Forum the right to cast the vote on behalf of the Full Member giving the proxy.

Full instructions on how a Full Member can cast a vote electronically, via email, is described in Section 5 of this notice.

The Board strongly urges you to submit a vote via email, submitted directly to Marc Robins, the SIP Forum Managing Director.

3.3 – Candidates for Election

• Allyson Blevins – Sinch
• Keith Buell – Numeracle (current board member standing for re-election)
• David Casem – Telnyx
• Nick Degani – Reticulated Strategies LLC
• Henry Hayter – TransUnion
• Lisa Marie Maxson – 10x People
• Greg Rogers – Bandwidth (current board member standing for re-election)
• Harold Salters – CTIA (current board member standing for re-election)
• Richard Shockey – Shockey Consulting (current board member standing for re-election)

3.4 – Candidate Statements and Biographies

The statements by the candidates about their desire to serve on the board, along with their biographies, are shown here as provided by each candidate. The Board strongly recommends you read these, as we seek Directors who will add substantial value, so it is crucial your vote is well-informed.

Candidates are listed in alphabetical order by last name. Please do not allow this order to influence your voting.

The Board has not endorsed any slate of candidates.

3.4.1 – Allyson Blevins – Sinch

3.4.1.1 – Statement of Candidacy

Over the past 20 years, I’ve worked with service providers, vendors, regulators, and industry organizations on the operational and policy issues that help communications networks function every day. While much of my work has focused on numbering, local number portability, and interconnection, it has also given me the opportunity to develop practical, consensus-based solutions across technical, operational, and regulatory disciplines.

My experience has given me an appreciation for how standards development, operational implementation, and regulatory policy intersect. I hope to bring that perspective to the Board. As communications networks continue to evolve, collaboration across those disciplines is more important than ever, and I believe the SIP Forum plays an important role in advancing interoperability and addressing the challenges facing next-generation communications.

If elected, I will bring a collaborative approach, a willingness to listen to different perspectives, and a commitment to helping the Forum continue delivering value to its members. I look forward to supporting the Forum’s mission and working with the Board and membership to help shape its future.

3.4.1.2 – Biography

Allyson Blevins is Senior Numbering Policy & Regulatory Affairs Director at Sinch, where she leads the company’s engagement on telecommunications numbering policy, interconnection, local number portability, and regulatory affairs.

With more than 20 years of experience in telecommunications, Allyson specializes in numbering policy, number portability, industry standards, and regulatory affairs. She currently serves as Co-Chair of both the ATIS Industry Numbering Committee (INC) and the Number Portability Industry Forum (NPIF), and previously served on the North American Numbering Council (NANC).

Through her participation in telecommunications standards and industry forums, Allyson collaborates with stakeholders across the telecommunications industry to build consensus on complex operational and policy issues. She is a frequent speaker at industry conferences, workshops, and regulatory forums on numbering policy, industry standards, and emerging telecommunications issues.

3.4.2 – Keith Buell – Numeracle

3.4.2.1 – Statement of Candidacy

Despite being a lawyer by trade, I have been told I should have been an engineer given how my mind works. I am committed to learning the technology behind every legal or policy issue I confront. Our nation’s collective fight against robocalls, impersonation fraud, and the burgeoning dilemmas with artificial intelligence will continue to merge technology issues and public policy.

My legal career has involved a wide array of technical issues, including TDM to SIP transitions, network migrations and retirement, interconnection, collocation, wireless infrastructure, STIR/SHAKEN implementation, and others. As a policy subject-matter expert, I have worked on robocall mitigation, privacy, net neutrality, identity verification/Know Your Customer, and international standards to fight fraud.

3.4.2.2 – Biography

In Keith’s professional career, he has worked on robocall policy from a variety of perspectives. As assistant general counsel at Verizon, Keith was a litigator on various telecom fraud cases involving the company, including an auto dialer case where the opposing party sequentially dialed every 8YY number in the country. At Sprint (and subsequently T-Mobile after the merger), he was the lead regulatory attorney on robocall policy and worked with his counterparts at the other carriers, as well as with the Federal Communications Commission, trade associations, and the SIP Forum.

He also worked at a major international gateway provider on robocall policy, gaining useful insights into international battles against robocalls as well as the ins and outs of international IP call routing and technologies. Keith’s work at the Federal Communications Commission in 2022-2023 focused on numbering issues, including number rotation, number assignment, and number exhaust.

Keith now serves as general counsel and head of global public policy at Numeracle with a focused mission on implementing robust Know Your Customer polices and embedding identity information into electronic communications so the recipient knows with certainty who is contacting them.

3.4.3 – David Casem – Telnyx

3.4.3.1 – Statement of Candidacy

I look forward to serving as SIP Forum Director, and supporting the vitally important work of the association.

3.4.3.2 – Biography

David Casem is Co-Founder and CEO of Telnyx, where he leads one of the most advanced global communications and AI infrastructure platforms in the market. Since founding Telnyx in 2009, David has built a full-stack platform that unifies carrier-grade communications, real-time connectivity, and AI-driven capabilities, giving businesses unprecedented control over how they build and scale conversational experiences. Telnyx’s ultra-low-latency architecture and developer-first tools power mission-critical communications for companies operating at global scale.

As a self-taught engineer and entrepreneur, David built the first iteration of a phone company using open source software, a few relationships and a license from the FCC. Telnyx is now a global software-defined telco whose problem domain includes identifying the best submarine cables to interconnect continents and understanding international regulatory systems to arbitrage the wireless spectrum.

David studied economics at Swarthmore College and splits his time between Telnyx’s offices in Chicago and Dublin.

3.4.4 – Nick Degani – Reticulated Strategies LLC

3.4.4.1 – Statement of Candidacy

I would be honored to be elected as a Board Member of the SIP Forum. I draw from a deep regulatory experience and especially relish diving into tough problems that span technology, engineering, law, and economics–basically everything telecom.

I am especially excited to be standing for this position while the industry is finally faced with the imminent sunset of the TDM network and the onset of the full IP Transition.

I look forward to learning from others at the SIP Forum, and hope I will be able to contribute in turn.

3.4.4.2 – Biography

Nick is the principal of Reticulated Strategies LLC, a telecom consulting firm, which he founded in 2021. He is also the Chief Strategist of the Digital Progress Institute, a think tank he co-founded that is dedicated to bridging the digital policy divide through bipartisan, incremental reform. And he is an adjunct faculty member of the Antonin Scalia School of Law at George Mason University, where he teaches a Communications Law class.

Nick spent more than 13 years at the Federal Communications Commission, serving as both Senior Counsel to FCC Chairman Ajit Pai and Acting General Counsel of the agency, with experience working on a wide variety of telecommunications matters, including wireline matters such as the Universal Service Fund and intercarrier compensation, wireless matters such as the FCC’s 5G FAST plan and the C-band spectrum auction, and consumer issues such as robocalling and 988. While at the FCC, he was detailed to the Committee on Energy and Commerce of the U.S. House of Representatives to work on, among other things, the 2012 Spectrum Act.

Before the FCC, he clerked on the U.S. Court of Appeals for the Sixth Circuit for Judge Jeffrey Sutton. He graduated magna cum laude from Yale University with a B.S. in Computer Science/Electrical Engineering and History in 2003, and he graduated cum laude from Harvard Law School in 2006.

3.4.5 – Henry Hayter – TransUnion

3.4.5.1 – Statement of Candidacy

When I served in the United States Air Force, my specialty was secure, encrypted communications, electronic countermeasures, and attack and fire control systems for America’s most advanced fighter jets. This laid a technical and ethical foundation that I have spent my entire career building on.

As a civilian, I was an early contributor to the growth of mobile communications, working on the first technical team to deploy GSM in North America, the first team to deploy Packet-Switched mobile data, and the first team to enable Mobile Data Roaming. I watched the proliferation of these powerful devices with a sense of pride and accomplishment, understanding that mobile access was a great equalizer and the front line of the information revolution.

As my career progressed, I believe we all came to the realization that this proliferation has dramatically increased the attack surface and exposed our most vulnerable population to being preyed upon by bad actors who can be anywhere in the world. I have shifted my focus both personally and professionally to advancing elements of trust and protection to the same people we have empowered and endangered with the same stroke.

I fully believe that the SIP Forum is a key brain trust for discussing and aligning on the best way to secure this ecosystem we created, and further that we have a responsibility to do so. I humbly appreciate the opportunity to help steer the direction of the group going forward.

3.4.5.2 – Biography

Henry Hayter is the head of TransUnion’s Caller ID Authentication products, which make up one pillar of TransUnion’s Trusted Call Solutions suite. Henry’s background spans 30 years of working in technical and business roles for telecom, big tech, startup, and consultation firms. Prior to joining TransUnion, Henry spent 20 years working in product management, strategy, and solutions engineering roles in enterprise mobile, voice, and messaging ecosystems. Henry has also worked for each of the top 3 mobile operators in the United States in various technical leadership roles.

Henry’s current responsibilities at TransUnion include business, technical, and regulatory oversight for all Call Authentication solutions. These solutions are comprised of in-band STIR/SHAKEN signing and verification solutions, STI-PA and STI-CA solutions, and out-of-band authentication solutions based on STIR that enable end-to-end authentication between Enterprises and Terminating Service Providers. Additionally, Henry is responsible for inbound and outbound contact center solutions designed to mitigate impersonations, account takeover fraud, and third-party scams. He participates in many industry focus groups designed to restore trust to the communications channel for enterprises and consumers alike.

3.4.6 – Lisa Marie Maxson – 10x People

3.4.6.1 – Statement of Candidacy

Throughout my career in telecommunications, which predates the Telecommunications Act of 1996, I have dedicated myself to solving complex numbering challenges that keep our industry connected. As the founder and CEO of 10x People and having previously authored the original NPAC CMIP interface specification that still underpins local number portability (LNP) today, I have witnessed firsthand how protocols must evolve to keep pace with technological breakthroughs and shifting regulatory landscapes.

Our industry sits at a critical junction. With the FCC’s ongoing push toward all-Internet Protocol-enabled services (IPES) and the crucial, collective fight to eliminate illegal robocalling and restore consumer trust, the technical standards we champion have never been more vital. The SIP Forum plays a paramount role as a neutral, collaborative forum driving interoperability, security, and innovation.

My active work on the ATIS Board of Directors and my background as a former voting member of the FCC’s North American Numbering Council (NANC) give me a unique macro-level perspective on the alignment between standard-setting bodies, regulatory compliance, and operational execution. I hope to bring this pragmatic blend of entrepreneurial agility, technical architecture experience, and regulatory insight to the SIP Forum Board. I look forward to working alongside this dedicated group of industry leaders to advance a secure, robust, and scalable IP communications ecosystem. Thank you for your consideration.

3.4.6.2 – Biography

Lisa Marie Maxson is the Founder and CEO of 10x People, LLC, a market-leading provider of cloud-based numbering solutions. A pioneer in telecom software, Lisa Marie has been at the leading edge of communication systems since graduating from the University of Kentucky in 1989 with a B.S. in Computer Science.

Following early foundational work at IBM, she seized the opportunities of telecom deregulation in 1996 to co-found Telecom Software Enterprises (TSE), where she served as the primary author of the industry’s NPAC CMIP Interface—a core standard continuously utilized for LNP from its inception to the present day. After TSE was acquired, she founded Transydian in 2004 to build critical custom software systems handling 800-number routing, roaming settlement charges, and number portability. In 2013, she spun those assets into 10x People, which now focuses heavily on streamlining manual numbering processes, managing authoritative data, and enabling compliance with modern IPES transitions.

Lisa Marie is heavily engaged in industry governance, currently serving on the ATIS Board of Directors and previously acting as a voting member on the FCC’s North American Numbering Council (NANC). In recognition of her entrepreneurial success and technological contributions, she was inducted into the University of Kentucky College of Engineering Hall of Distinction in 2016.

3.4.7 – Greg Rogers – Bandwidth

3.4.7.1 – Statement of Candidacy

As Head of Global Policy and Regulatory Affairs for Bandwidth Inc. I believe I can bring a somewhat unique set of skills and perspectives to the SIP Forum Board of Directors. As a regulatory and public policy lawyer, I represent Bandwidth in a wide range of regulatory and policy matters. Bandwidth is one of the nation’s largest competitive carriers based upon the number of telephone numbers in service and its PSTN interconnection footprint. Bandwidth is also an all-IP based provider and thus, it is focused on how the industry and the regulatory environment continue to evolve toward IP-based solutions. Bandwidth also operates in approximately 60 nations around the globe by virtue of its acquisition of Voxbone Communications in November of 2020.

I served on the North American Numbering Council (NANC) as Bandwidth’s representative and also did so on behalf of Level 3 Communications previous to that. I have also been a Board Member of the STI-GA from the beginning and have been very close to the industry efforts to deploy STIR/SHAKEN across the industry. Among other services that Bandwidth offers are competitive SMS/MMS and Toll-Free based services. In those areas, I represent Bandwidth with other carriers and service providers and within industry forums like CTIA with respect to establishing network routing and service provider guidelines. Finally, Bandwidth is also a 911 service provider, which is a critical component of how voice and text communications, that may or may not be associated with NANP numbers, operate. Therefore, with this background and set of responsibilities I hope to continue to be an effective Board member with the SIP Forum and in support of its continued efforts toward establishing important industry practices and standards in an exciting transitional period of the communications industry.

3.4.7.2 – Biography

Greg is Head of Global Policy and Regulatory Affairs for Bandwidth Inc. in Bandwidth’s office in Denver, CO. Greg is primarily responsible for Bandwidth’s wide array of regulatory and public policy matters at all levels of government both domestically and internationally. Bandwidth is a multi-faceted communications service provider that operates a nation-wide all IP-based network in the U.S. from its headquarters in Raleigh, NC.

Bandwidth.com CLEC, LLC. is a Bandwidth affiliate that operates a CLEC with a local PSTN interconnection and NANP footprint that spans the 48 continental states. Bandwidth’s CLEC network is a critical component of its full suite of VoIP and SMS/MMS service offerings. Bandwidth also operates a nation-wide 911 VPC network aimed at supporting emergency calling for IP-enabled services. As a wholesale provider, Bandwidth is also one of the largest Toll Free Resporgs in the country.

Greg has been at Bandwidth since 2010. Prior to joining Bandwidth, he was Senior Corporate Counsel for Level 3 Communications for over a decade. Greg is a graduate of the University of Colorado School of Law in Boulder, CO.

3.4.8 – Harold Salters – CTIA

3.4.8.1 – Statement of Candidacy

I have been a regular participant on the Joint ATIS/SIP Forum IP-NNI Task Force, as well as the ATIS Non-IP Call Authentication Task Force, since November 2016 and June 2020, respectively, in my role as a technology consultant for CTIA — Everything Wireless. I am well-versed on the STIR/SHAKEN and Rich Call Data protocols and the special insights that the wireless sector brings to deployment, device display, emergency comms, text messaging and the need for ecosystem integration, where the SIP Forum plays such a vital role. I am a proud participant in the creation and ongoing work of CTIA’s Branded Calling ID™, providing a standards-based RCD ecosystem solution incorporating end-to-end security by design.

3.4.8.2 – Biography

Prior to my consulting practice, I was T-Mobile’s Director of Federal Regulatory Affairs for 14 years working on a broad range of wireless technical public policy issues, including cybersecurity, homeland security, network reliability/resilience and disabilities access. In those roles, I represented T-Mobile at DHS’s National Cybersecurity & Communications Integration Center, the FCC’s Communications Security, Reliability & Interoperability Council, and ATIS’s Network Reliability Steering Committee.

Prior to that, I was Sr. Director for Government Relations at PCIA, predecessor to the Wireless Infrastructure Association (WIA), and worked at two DC law firms and the FCC, where I began my career working on private land mobile and microwave issues. I’m a graduate of Queens College (CUNY) and have an MBA from Cornell University.

3.4.9 – Richard Shockey – Shockey Consulting

3.4.9.1 – Statement of Candidacy

The SIP Forum is still doing very well in a rapidly changing telecom environment. It’s clear there is enough work to keep us busy for many years to come. The SIP Forum has been able to quietly and consistently be a neutral technical voice assisting National Legislative, Enforcement and Regulatory Authorities and industry in navigating the complex issues of Robocalls and Caller ID spoofing. Our joint agreement with ATIS on STIR/SHAKEN has proven to be of enormous value to the SIP Forum in providing a venue for a broad range of stake holders to participate in complex technical discussions that they might not be able to do otherwise. This agreement has been an attractive alternative to many companies to either join the SIP Forum or renew their membership based on our collective leadership in this area.

The Forum has also become very active in supporting and promoting the complex work involved in accelerating the transition to an All-IP national communications infrastructure, due to its foundational significance on the reliable delivery of call authentication, branded calling, and a host of other communications services and applications. Central to this effort is a new industry standard being developed by the SIP Forum/ATIS Joint IP-NNI Task Force – called the “Agreement-Less IP Interconnection over the Internet”, or “ALIII” standard – designed to help accelerate the transition.

I am especially proud of SIPNOC — our annual in-person conference (entering its 15th year with SIPNOC 2026) and our virtual conferences including the STIR/SHAKEN SUMMIT, KYC SUMMIT, AI SUMMIT, and BRANDED CALLING SUMMIT, all of which bring together thousands of engineers and product experts from service providers and vendors around the world.

I look forward to the opportunity to continue to serve the SIP Forum Board of Directors and the overall SIP community.

3.4.9.2 – Biography

Richard Shockey is an internationally recognized expert on Data Communications, Voice over IP Technology, Numbering and Signaling, and is currently the Principal of Shockey Consulting, a private firm advising telecommunications companies, national regulatory authorities and the investment community on any number of issues related to Next Generation Real Time Communications products and services. Visit www.shockey.us for more information.

Mr. Shockey also currently serves as Chairman of the Board of Directors of the SIP Forum.

Mr. Shockey has been a member of the United States Federal Communications Commission’s Communications Security, Reliability, and Interoperability Council (CSRIC), an FCC advisory council tasked with advising the federal agency regarding best practices and practical actions pertaining to the security, reliability, and interoperability of communications systems.

4 – Discharge of Liability for Board Members and Managing Director

The By Laws of the SIP Forum require that, at each general meeting, the members vote on whether to discharge the Board Members and the Managing Director from liability for actions or inactions resulting from their service to the SIP Forum over the prior year. In all annual general meetings to date, this has been presented, and the Board Members have been accordingly discharged. At this time, the Board represents that the Directors and Managing Director have collectively performed all required responsibilities for this past year, and requests discharge from liability. Full Members shall vote Yes or No on their ballots to so discharge the Board and Managing Director.

The Board recommends a Yes vote on this item.

5 – Procedure for Voting

The By Laws permit voting by proxy, using paper ballots sent by surface mail or electronically submitted ballots that are returned using a method that the Board deems sufficient to establish the authenticity of the ballot.

5.1 – Voting by Written Proxy via Surface Mail

Included in the bundle distributed to the Full Members with this Annual General Meeting Notice is a voting form (in PDF file format) entitled “2025-sf-ballot.” If a Full Member intends to submit a ballot to vote by written proxy sent by surface mail (instead of submitting one via return email), each Full Member should do the following as described immediately below in Section 5.1.1.

5.1.1 – Minimal Procedure for Proxy Voting

The Full Member shall mark the aforementioned voting form (either by modifying the document to indicate the mark, or by printing the document and marking it in ink) to:

• Rank your votes for Director’s candidates. Mark your first preference “1”, your second preference “2”, and so on. You may vote for as many candidates as you wish, but the board recommends you vote for all 9 candidates.
• Approve or reject the discharge of Directors’ liability.
• Deliver the Voting Form to the SIP Forum Managing Director prior to the date of the Annual General Meeting by sending the Voting Form via surface mail to the address listed on the ballot. Please note that if surface mail is used, the Voting Form must be sent to arrive NO LATER THAN WEDNESDAY, AUGUST 12, 2026 or if email delivery is used, the Voting Form must be sent to arrive NO LATER THAN FRIDAY, AUGUST 14, 2026.

5.2 – Electronic Voting via Email

The Board has concluded that one method is acceptable for electronic voting via email:

• Full Members will mark the paper Voting Form ballot, and return it to the Managing Director via electronic mail as a scanned image file or PDF. The Managing Director shall use reasonable efforts to assure that the received email has been sent from a domain name that appears to be from a Full Member organization.

5.2.1 – Email Ballots

Follow this procedure to vote by email:

• Print a copy of the voting form entitled “2025-sf-ballot”.
• Mark the Voting Form by ranking your votes for Board Member candidates, and check the box to vote Yes or No on the Liability Discharge question.
• Sign the copy of the marked voting form.
• Scan the marked and signed voting form, and attach the associated document file to an email addressed to Marc Robins, the SIP Forum Managing Director at marc.robins@sipforum.org. (PDF, JPG, TIFF, or GIF are all acceptable electronic formats.)
• Alternatively, an application such as Adobe Acrobat can be employed to complete the required fields on the form.

5.3 – Deadline for Ballot Return for Proxy Voting

Voting Form ballots sent to the Managing Director by Email to be handled by proxy must be received ON OR BEFORE FRIDAY, 14 AUGUST 2026 (two business days before the Annual General Meeting) in order to be counted.

5.4 – Ballot Counting

Ballots, including those received in email, and via surface mail, will be counted when the vote is called in the Annual General Meeting. Results will be announced at the meeting, and official minutes taken to reflect the voting.

– END –

SIP Forum 2025 General Meeting Notice

JULY 17, 2026

Document number: GA-47-0