his model is strictly valid for X.25 and FR only. In ATM, switching can be based both on VCi and VPi. Connection-oriented switching: Control layer Control layer T-CS: {inREi,inVCi)->{outREi,outVCi} Connection- relayOrd{REi, VCi,..}} T-RE: REiREdef oriented switching termOrd{REi, VCi,, } actor The model below shows the asynchronous multiplexing actor. Asynchronous multiplexing: termOrd{CHi,...} Asynchronous multiplexing relayOrd{toLi,CHi,...} actor T-L: Lie-AAli termOrd{fromLi,CHi,... relayOrd{CHi,..} Appendix C: AMLn Configuration Parameters and Tables C1 PARAMETERS AA (Actor address): The identifier used within a layer for an actor. The AA in a common agent layer may be built by the two parameters ALi and As, i.e., AA::={ALi,As}. AAli (Actor-agent interface identifier): Identifies an actor-agent interface. Only known by agents and actors inside a layer element. Applicable for both SAGs and SACs Relaying layers Control layers Identified by AAIi Common agent layers Common agent layers with associations ALi (Actor-layer identifier): A protocol parameter in an association protocol (of a common agent layer) that identifies an actor layer. (ALI,AS) (ALi,As) Actor suffix is 1, actor layer is 2 Actor suffix is 3, {ALi,As} actor layer is 1 As (Actor suffix): A protocol parameter in an association protocol (of a common agent layer) that identifies an actor within an actor layer. ASi (Association identifier): A protocol parameter in an association protocol that identifies a temporary ses- sion (or "dialogue") between two actors. APi (Access-point identifier): A protocol parameter that identifies a layer element within a node. data2 data1 {ap1,data1} {ap2,data2} CEi (Connection-endpoint identifier): An identifier in a layer interface of a connection-oriented packet-switching layer. Identifies a temporary connection. CHi (Channel identifier): Identifies one of several channels in a permanent or semi-permanent route. Ci (Connection identifier): A protocol parameter in a connection-oriented packet-switching layer that iden- ti