ENV 41802-4:1992

Information systems interconnection - X.25 Protocol Relaying - Part 4: PSDN Subnetwork dependent media dependent requirements for virtual calls over a permanent access

Scope

This part of this functional standard specifies subnetwork-type dependent media dependent requirements applicable to an interworking unit using virtual calls over a permanent access to a PSDN. The operation of an interworking unit may involve relaying from one subnetwork to another, and those subnetworks need not be of the same type. This part of this functional standard applies only to communications using PSDN subnetworks with permanent access on which virtual calls are used.