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ETSI EG 201 066-1
- Integrated Services Digital Network (ISDN); Digital Subscriber Signalling System No. one (DSS1) protocol; Application of the Bearer Capability (BC), High Layer Compatibility (HLC) and Low Layer Compatibility (LLC) information elements; Part 1: Test Suite
- standard by European Telecommunications Standards Institute, 04/01/1999
- Publisher: ETSI
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To take account of changes in ETR 018 when upgrading to EG 201 018: coding to support the audiographic conference and videoconference teleservice, and the user signalling bearer service.