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Two New ATIS/SIP Forum Resources Advance Industry-Led Solutions to Mitigate Unwanted Robocalling

Two New ATIS/SIP Forum Resources Advance Industry-Led Solutions to Mitigate Unwanted Robocalling

WASHINGTON, DC — ATIS and the SIP Forum today announced the release of two new technical reports advancing industry efforts to mitigate unwanted robocalling: the Technical Report on a Framework for Display of Verified Caller ID (ATIS-1000081) and the Technical Report on SHAKEN API for a Centralized Signing and Signature Validation Server (ATIS-1000082).

These two new resources further define the framework provided by the Signature-based Handling of Asserted Information using toKENs (SHAKEN) (ATIS-1000074) specification, which offers, for the first time in the network, a practical strategy to provide verified information about the calling party as well as the call’s origin. SHAKEN specifically defines a mechanism to verify a calling number and specifies how identity information will be securely transported in SIP “on the wire.”  It was developed in the ATIS/SIP Forum Joint IP-NNI Task Force.

“These two new resources are critical to helping service providers implement SHAKEN,” said ATIS President and CEO Susan Miller. “They are products of ATIS’ continued collaboration with the SIP Forum and are instrumental to industry efforts to address the robocalling problem and maintain consumer trust in the voice network.”

“The SIP Forum is committed to working together with ATIS to continue to develop the operational documents for the SHAKEN Framework, and these two new reports provide important additional guidelines and details essential to the successful deployment of the SHAKEN standard,” said SIP Forum Chairman Richard Shockey.

The Technical Report on a Framework for Display of Verified Caller ID provides a framework for signaling verified Caller ID information from the network to a User Equipment (UE), and displaying the information on the UE in a uniform manner, independent of technology. The goal is to produce display guidelines that help meet the goals of regulators and consumer protection agencies for empowering consumers with simple and effective information on the displayed Caller ID. This will help consumers know if a call is from who it says it is from so they can make an informed decision on whether to answer.

The Technical Report on SHAKEN API for a Centralized Signing and Signature Validation Server provides additional detail on one possible implementation of the SHAKEN specification in service provider networks. It defines a RESTful interface (API) that can be used in the SHAKEN framework to interface with a centralized server to sign and verify telephony identity for multiple nodes within a network. Implementing SHAKEN authentication and verification functions in a centralized server that can be accessed via an API supports cloud-based implementations and is designed to enable a more cost-effective network deployment.

All SHAKEN resources are available on the ATIS website here or on the SIP Forum site here.

About ATIS
As a leading technology and solutions development organization, the Alliance for Telecommunications Industry Solutions (ATIS) brings together the top global ICT companies to advance the industry’s business priorities. ATIS’ 150 member companies are currently working to address 5G, cyber security, robocall mitigation, IoT, artificial intelligence-enabled networks, the all-IP transition, network functions virtualization, smart cities, emergency services, network evolution, quality of service, billing support, operations, and much more. These priorities follow a fast-track development lifecycle – from design and innovation through standards, specifications, requirements, business use cases, software toolkits, open source solutions, and interoperability testing.

ATIS is accredited by the American National Standards Institute (ANSI). ATIS is the North American Organizational Partner for the 3rd Generation Partnership Project (3GPP), a founding Partner of the oneM2M global initiative, a member of the International Telecommunication Union (ITU), and a member of the Inter-American Telecommunication Commission (CITEL). For more information, visit

About the SIP Forum
The SIP Forum is a leading IP communications industry association that engages in numerous activities that promote and advance SIP-based technology, such as the development of industry recommendations; interoperability testing events including SIPit, and special workshops, educational activities, and general promotion of IP communications standards, services, and technology for service provider, enterprise and governmental applications. The SIP Forum is also the producer of the annual SIPNOC conferences (for SIP Network Operators Conference), focused on the technical requirements of the service provider community. One of the Forum’s technical activities is the development of the SIPconnect Technical Recommendation – a standards-based SIP trunking recommendation that provides detailed guidelines for direct IP peering and interoperability between IP PBXs and SIP-based service provider networks, and the SIPconnect Certification Testing Program, a unique certification testing program that includes a certification test suite and test platform, and an associated “SIPconnect Certified” logo program that provides an official “seal of certification” for companies products and services that have officially achieved conformance with the SIPconnect specification. Other important Forum initiatives include work in security, SIP and IPv6, and IP-based Network-to-Network Interconnection (IP-NNI). For more information about SIP Forum initiatives, please visit:

Marcella Wolfe, Manager – Public Relations and Marketing Communications, ATIS