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BS PD CEN ISO/TR 20659‑2:2024 Rheological test methods. Fundamentals...

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ITU-T Q.162 Routine testing of equipment (local maintenance)
ITU-T Q.475 Normal release of outgoing and incoming R2 registers
ITU-T F Supplement 2 II.4 Terms and definitions for telex
ITU-T Q.291 Security arrangements; General; Basic security arrangements; Types of failure, recognition of failure and abnormal error rates
ITU-T Q.253 Functional description of the signalling system; Association between signalling and speech networks
ITU-T Q.430 Conversion between analogue and digital versions of System R2 line signalling
ITU-T G Supplement 35 III.5 Guidelines concerning the mesasurement of wander
ITU-T Q.258 Signal unit formats and codes; Telephone signals