基于统一IMS的业务技术要求 呼叫等待与呼叫保持业务（第一阶段）
Technical Requirements of Services based on the Unified IMS Call Waiting (CW) and Call HOLD (HOLD) Services (Release 1)
2009-12-11
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
YD/T 1933-2009
基于统一IMS的业务技术要求 IP Centerex业务（第一阶段）
Technical Requirements of Services Based on the Unified IMS IP Centrex Service(Release 1)
2009-06-15
YD/T 2010-2009
基于统一IMS的业务技术要求 多媒体会议业务（第一阶段）
Technical Requirements of Services based on the Unified IMS Multimedia Conferencing Service (Release 1)
2009-12-11
YD/T 2013-2009
基于统一IMS的业务技术要求 恶意呼叫追踪和匿名呼叫拒绝业务(第一阶段)
Technical Requirements of Services based on the Unified IMS Malicious Call Identification (MCID) and Anonymous Communication Rejection (ACR) Services (Release 1)
2009-12-11
YD/T 2009-2009
基于统一IMS的业务技术要求 个性化振铃音业务（第一阶段）
Technical Requirement of Services based on the Unified IMS Customized Multimedia Ringing Service (Release 1)
2009-12-11
YD/T 1932-2009
基于统一IMS的业务技术要求 标识显示及限制类业务（第一阶段）
Technical Requirements of Services based on the Unified IMS Identification Presentation and Restriction Service(Release 1)
2009-06-15
YD/T 2008-2009
基于统一IMS的业务技术要求 多媒体彩铃业务（第一阶段）
Technical Requirement for Services based on the Unified IMS Customized Multimedia Alerting Service (Release 1)