(WITHDRAWN) Digital Subscriber Signalling System No. 1 (DSS 1) - Generic Procedures for the Control of ISDN Supplementary Services - Digital Subscriber Signalling System No. 1 Network Layer (Study Group XI) 92 pp
This Recommendation defines the generic procedures applicable for the control of supplementary services at the user-network interface. These procedures may be used for the invocation and operation of supplementary services in association with existing cal