本规范扩展了SHAKEN框架，以支持传输RFC 8225《个人断言令牌》中定义的个人断言令牌（Passport），用于传输过程中使用TDM信令和/或TDM交换机的呼叫。本规范遵循以下核心原则:1。该解决方案不会对受到震动的兼容VoIP服务提供商提出任何新要求。2.优选地，该解决方案支持代表大多数流量的最常见呼叫场景，但不需要支持所有可能的呼叫场景。 3.该解决方案支持并促进了迁移到基于VoIP的网络的长期行业目标。在该规范中，加密签名的护照在带外交换，即与电话网络信令分离。带外交换护照的机制基于ietfstir草案-servprovider-oob-01，即服务提供商的带外STIR。建议将ATIS-1000097《关于非IP通信呼叫方身份验证替代方案的技术报告》与本文件一起考虑，该报告评估了在TDM网络中实施这种呼叫身份验证机制的可行性。

This specification extends the SHAKEN framework to enable the transmission of Personal ASSertion Tokens (PASSporTs), as defined in RFC 8225, Personal Assertion Token, for calls that use TDM signaling and/or TDM switches during transit. This specification adheres to the following core principles:1. The solution does not place any new requirements on SHAKEN-compliant VoIP service providers.2. Preferably, the solution supports the most common call scenarios representing a majority of traffic but does not need to support all possible call scenarios.3. The solution supports and facilitates the long-term industry goal of migrating to VoIP-based networks.Within the specification, cryptographically signed PASSporT(s) are exchanged out-of-band, that is, separate from the telephone network signaling. The mechanism of exchanging PASSporT(s) out-of-band is based on draft-ietfstir- servprovider-oob-01, Out-of-Band STIR for Service Providers.It is recommended that ATIS-1000097, Technical Report on Alternatives for Caller Authentication for Non-IP Traffic, evaluating the viability of implementing this call authentication mechanism for TDM networks, be considered along with this document.