• TS 122 173 : 13.2.0

    Current The latest, up-to-date edition.

    DIGITAL CELLULAR TELECOMMUNICATIONS SYSTEM (PHASE 2+) (GSM); UNIVERSAL MOBILE TELECOMMUNICATIONS SYSTEM (UMTS); LTE; IP MULTIMEDIA CORE NETWORK SUBSYSTEM (IMS) MULTIMEDIA TELEPHONY SERVICE AND SUPPLEMENTARY SERVICES; STAGE 1 (3GPP TS 22.173 VERSION 14.3.0 RELEASE 14)

    Publisher:  European Telecommunications Standards Institute

    Published: 

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