Business Telecommunications (BT); Approval requirements for complex customer premises apparatus and installations connected to the Public ISDN (including principles for the application of the essential requirements to any apparatus)
商业电信(BT);与公共ISDN连接的复杂客户场所设备和装置的批准要求(包括对任何设备应用基本要求的原则)
Definitions: Complex Customer apparatus; Installation, Approval standards: which aspects should be covered by these. Considerations: Bearer services and Teleservices in ETR 010; also LANs and data apparatus in addition to ISPBXs; principles developed should also be applicable to the future broadband services