动画给出了一种典型的B-ISDN信令结构。
典型的B-ISDN信令结构
制定ATM信令的国际性组织主要有以下单位：
· ITU-T
关于B-ISDN规范的标准为I系列；
关于B-ISDN信令为Q系列，如Q.2931即为参照N-ISDN Q.931扩展的B-ISDN UNI信令消息。B-ISDN网络的网间信令记作B-ISUP（宽带ISDN用户部）信令，而专用网络到专用网络之间的接口信令记作PNNI信令。
· ATM Forum (ATM 论坛)
主要制定UNI ATM信令，版本有：
－UNI 3.0
－UNI
3.1
－UNI 4.0
网间信令记作B-ICI信令
·美国ANSI
·欧洲ETSI
部分重要的信令规范可参考以下文献：
1. The ATM Forum. ATM User-Network Interface (UNI) Signaling
Specification, version 4.0.Document AF-SIG-0061.000, July 1997.
2. International Telecommunication Union-Telecommunications Standardization
Sector. Broadband Integrated Services Digital Network (B-ISDN)
Digital Subscriber Signaling No.2 (DSS 2), User Network Interface
Layer 3 Specification for Basic Call/Connection Control. Recommendation
Q.2931, February 1995.
3. Telcordia Technologies, Inc. B-ISDN Access Signaling Generic
Requirements. GR-1111-CORE, November 1994.
4. International Telecommunication Union-Telecommunications Standardization
Sector. Broadband Integrated Services Digital Network (B-ISDN)
Digital Subscriber Signaling No.2 (DSS 2), User Network Interface
Layer 3 Specification for Point-to-Multipoint Call/Connection Control.
Recommendation Q.2971, 1996.
5. The ATM FORUM. BISDN Inter Carrier Interface (B-ICI) Specification,
version 2.0 (Integrated). Document AF-BICI-0013.003, December
1995.
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