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）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)
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
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)