Standard Number: YD/T 4135-2022(YD/T4135-2022)
Chinese:LTE网络实施号码携带的技术要求
English:Technical Requirements for Implementing Number Portability in LTE Networks
Effective Date:2023-01-01
Standard Applicability:This document applies to voice over LTE networks using VoLTE technology as well as CSFB after circuit domain (2G/3G), dual standby under two transition scenarios of number portability technology solutions.
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