name: TISPAN
full_form: Telecommunications and Internet converged Services and Protocols for Advanced Networks
context: - TISPAN -aware and legacy P-CSCFs coexistence: - The two types of P-CSCF differ in their handling of P-Access-Network-Info headers in a security-relevant way, as described in section 6.1. This raises the following issue: - How can the S-CSCF, which concurrently serves both TISPAN-aware and legacy P-CSCFs, know whether a P-CSCF is legacy or TISPAN-aware? NOTE 1: The handling of private user identities in Cx commands relating to registration requests without Authorization header remains left open in TISPAN Release 1 specifications. Therefore, proprietary solutions may be required in networks where TISPAN Release 1 IMS clients may send registration requests without Authorization header. Some of these proprietary solutions may require the I-CSCF to handle Cx commands in a way specific to TISPAN Release 1 IMS clients. In such a case the I-CSCF may use the P-Access-Network Info header to determine whether the request was sent over a TISPAN NASS network or a 3GPP network. In contrast to the
description: TISPAN (Telecommunications and Internet converged Services and Protocols for Advanced Networks) is an organization that defines standards and protocols for advanced networks, focusing on the convergence of telecommunications and internet services.
explanation: The text refers to TISPAN as a body that establishes standards and protocols, specifically mentioning its role in handling P-Access-Network-Info headers and coexistence with legacy P-CSCFs. This clearly identifies TISPAN as an organization involved in the telecommunications standardization process.
section_title: 5	Identified Issues
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biotag_Description: B-Organization,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O