本国际标准规定了附加网络功能（ANF）呼叫识别和呼叫链接（CIDL）， 适用于专用综合业务网（PISN）支持的各种基本业务。基本服务是 ISO/IEC 11574中规定。 ANF-CIDL是一种额外的网络功能，允许通过以下方式识别和关联整个PISN中的呼叫: 为每个新呼叫分配明确的标识符，也可以选择为转换的和逻辑链接的呼叫分配明确的标识符。 注1:本ANF旨在支持在网络环境（即PISN）中使用CSTA（ISO/IEC 18051）。使用 不排除其他应用的ANF。 根据ETS 300 387中描述的方法，补充业务规范分三个阶段生成。这 国际标准包含ANF-CIDL的第1阶段和第2阶段规范。第1阶段规范（第6条） 指定一般功能原则和功能。第2阶段规范（第7条）确定了功能实体 参与补充服务以及它们之间的信息流。

This International Standard specifies the Additional Network Feature (ANF) Call Identification and Call Linkage (CIDL), which is applicable to various basic services supported by Private Integrated Services Networks (PISN). Basic services are specified in ISO/IEC 11574. ANF-CIDL is an additional network feature which allows the identification and correlation of calls throughout a PISN by assigning unambiguous identifiers to each new call and also, as an option, to transformed and logically linked calls. NOTE 1 - This ANF has been developed to support the use of CSTA (ISO/IEC 18051) in a networked environment, i.e. in a PISN. Use of this ANF for other applications is not precluded. Supplementary service specifications are produced in three stages, according to the method described in ETS 300 387. This International Standard contains the stage 1 and stage 2 specifications of ANF-CIDL. The stage 1 specification (clause 6) specifies the general feature principles and capabilities. The stage 2 specification (clause 7) identifies the Functional Entities involved in the supplementary service and the information flows between them.