Token,Description,Reference
Client,Originating client/device,[RFC7852]
Access Network Provider,Access network service provider,[RFC7852]
Telecom Provider,Telecom service provider (including native and over-the-top VoIP services),[RFC7852]
Telematics Provider,"A sensor-based service provider, especially vehicle based",[RFC7852]
Language Translation Provider,A spoken language translation service,[RFC7852]
Emergency Service Provider,An emergency service provider conveying information to another emergency service provider,[RFC7852]
Emergency Modality Translation,"An emergency-call-specific modality translation service, e.g., for sign language",[RFC7852]
Relay Provider,"An interpretation service, e.g., video relay for sign language interpretation",[RFC7852]
Gateway,"An element translating/interworking between SIP-based emergency calling and another protocol (e.g., Signaling System 7)",[NENA-STA-034.1-2022][Randall_Gellens]
Other,Any other type of service provider,[RFC7852]