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ETSI TR 123981-V14.0.0
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Universal Mobile Telecommunications System (UMTS); LTE; Interworking aspects and migration scenarios for IPv4-based IP Multimedia Subsystem (IMS) implementations (3GPP TR 23.981 version 14.0.0 Release 14)
Standard published on 3.5.2017
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ETSI TR 123981-V15.0.0
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Universal Mobile Telecommunications System (UMTS); LTE; Interworking aspects and migration scenarios for IPv4-based IP Multimedia Subsystem (IMS) implementations (3GPP TR 23.981 version 15.0.0 Release 15)
Standard published on 28.6.2018
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ETSI TR 123981-V16.0.0
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Universal Mobile Telecommunications System (UMTS); LTE; Interworking aspects and migration scenarios for IPv4-based IP Multimedia Subsystem (IMS) implementations (3GPP TR 23.981 version 16.0.0 Release 16)
Standard published on 28.7.2020
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ETSI TR 123981-V17.0.0
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Universal Mobile Telecommunications System (UMTS); LTE; Interworking aspects and migration scenarios for IPv4-based IP Multimedia Subsystem (IMS) implementations (3GPP TR 23.981 version 17.0.0 Release 17)
Standard published on 5.4.2022
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ETSI TR 123981-V18.0.0
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Universal Mobile Telecommunications System (UMTS); LTE; Interworking aspects and migration scenarios for IPv4-based IP Multimedia Subsystem (IMS) implementations (3GPP TR 23.981 version 18.0.0 Release 18)
Standard published on 25.4.2024
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ETSI TR 123981-V19.0.0
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Universal Mobile Telecommunications System (UMTS); LTE; Interworking aspects and migration scenarios for IPv4-based IP Multimedia Subsystem (IMS) implementations (3GPP TR 23.981 version 19.0.0 Release 19)
Standard published on 14.10.2025
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ETSI TR 123981-V5.0.0
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Universal Mobile Telecommunications System (UMTS); Interworking aspects and migration scenarios for IPv4-based IP Multimedia Subsystem (IMS) implementations (3GPP TR 23.981 version 5.0.0 Release 5)
Standard published on 30.9.2004
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ETSI TR 123981-V6.2.0
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Universal Mobile Telecommunications System (UMTS); Interworking aspects and migration scenarios for IPv4-based IP Multimedia Subsystem (IMS) implementations (3GPP TR 23.981 version 6.2.0 Release 6)
Standard published on 31.12.2004
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ETSI TR 123981-V6.3.0
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Universal Mobile Telecommunications System (UMTS); Interworking aspects and migration scenarios for IPv4-based IP Multimedia Subsystem (IMS) implementations (3GPP TR 23.981 version 6.3.0 Release 6)
Standard published on 31.3.2005
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ETSI TR 123981-V6.4.0
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Universal Mobile Telecommunications System (UMTS); Interworking aspects and migration scenarios for IPv4-based IP Multimedia Subsystem (IMS) implementations (3GPP TR 23.981 version 6.4.0 Release 6)
Standard published on 30.9.2005
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