"Foreword This European Standard (Telecommunications series) has been produced by ETSI Technical Committee Services and Protocols for Advanced Networks (SPAN). The present document is part 1 of a multi-part standard covering the ETSI endorsement of ATM Inter-Network Interface (AINI) signalling specification@ as described below: Part 1: ""Protocol specification [ATM Forum Specification ATMInter-Network Interface (AINI) F-CS-0125.000 (1999)@ modified]""; Part 2: ""Protocol Implementation Conformance Statement (PICS)""."