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ISDN user-network interface layer 3 specification and testing method for basic call control--Part 1:Layer 3 specification for basic call control
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STANDARD published on 16.12.1997
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Designation standards: GB/T 17154.1-1997
Publication date standards: 16.12.1997
SKU: NS-869403
Country: Chinese technical standard
Category: Technical standards GB
Latest update: 2026-08-21 (Number of items: 2 298 377)
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