YD/T 1929-2009
统一IMS的需求（第一阶段）
Requirements for the Unified IMS(Phase 1)
2009-06-15
YD/T 3195-2016
基于统一IMS（第二阶段）的业务技术要求 总体
The technical specification for unified IMS(Phase 2) based services-General part
2016-10-22
YD/T 2187-2010
统一IMS归属用户服务器（HSS）设备技术要求（第一阶段）
Technical requirements for Home Subscriber Server(HSS) of the unified IMS(Phase 1)
2010-12-29
YD/T 3196-2016
基于统一IMS（第二阶段）的业务技术要求 短消息业务
The technical specification for unified IMS(Phase 2) based services-Short message service
2016-10-22
YD/T 3581-2019
基于统一IMS(第二阶段)的业务技术要求 多方视频通话
The techinical specification for unified IMS(Phase 2)based services - Multi-party video call
2019-11-11
YD/T 2186-2010
统一IMS代理会话控制设备(P-CSCF)技术要求(第一阶段)
Technical requirements for Proxy Call Session Control Function(P-CSCF) of the unified IMS(Phase 1)
2010-12-29
YD/T 2425-2012
统一IMS中的会话边界控制设备技术要求
Technical requirements of the session border controllerin unified IMS
2012-12-28
YD/T 1930-2009
统一IMS组网总体技术要求（第一阶段）
General Technical Requirements of the Networkingfor the Unified IMS(Release1)
2009-06-15
YD/T 2290-2011
统一IMS网络与软交换网络互通信令流程技术要求
Technical requirements for interworking between Unified IMS and softswitch
2011-05-18
YD/T 2975-2015
统一IMS网络支持多模单待语音呼叫连续性的技术要求
Technical requirements of unified IMS network for supporting eSRVCC
2015-10-14
YD/T 3582-2019
统一IMS网络（第二阶段）支持VoLTE的网络技术要求
General technical requirements of the VoLTE of the unified IMS (Stage2)
2019-11-11
YD/T 2184-2010
基于IMS的组管理(XDM)业务技术要求(第二阶段)
Technical requirements for IMS based group management service (Phase 2)
2010-12-29
YD/T 2182-2010
基于IMS的即按即说（PoC）业务总体技术要求（第二阶段）
Technical requirement for IMS based PoC service general(Phase 2)
2010-12-29
YD/T 2183-2010
基于IMS的即按即说（PoC）业务设备技术要求（第二阶段）
Technical requirement for IMS based PoC service equipment(Phase 2)
2010-12-29
YD/T 2181-2010
基于IMS的呈现(Presence)业务技术要求(第二阶段)
Technical requirements for presence service basing on IMS (phase Ⅱ)
2010-12-29
YD/T 1802-2008
基于IP多媒体子系统（IMS）的呈现（Presence）业务技术要求（第一阶段）
Technical Requirements for Presence Service Basing on IMS(Phase Ⅰ)
2008-07-28
YD/T 2185-2010
基于IMS的组管理（XDM）业务测试方法（第二阶段）
Test methods for IMS based group management service (Phase 2)
2010-12-29
YD/T 1934-2009
基于IMS的组管理(XDM)业务技术要求(第一阶段)
Technique Requirements for IMS based Group Management Service(Phase 1)
2009-06-15
YD/T 1931-2009
基于统一IMS的业务技术要求 呼叫前转类业务（第一阶段）
Technical Requirements of Services based on the Unified IMS Call Forwarding Service(Release 1)
2009-06-15
YD/T 2295-2011
基于统一IMS的业务技术要求 点击拨号业务（第一阶段）
Technical requirements of services based on the unified IMS. Click to dial service(Release 1)
2011-05-18