| Multicore and symmetrical pair/quad cables for digital communications - Part 1: Generic specification | |
| IEC 61156-1:2009, consolidated version, consists of the third edition (2007) and its amendment 1 (2009). The technical content is therefore identical to the base edition and its amendment and has been prepared for user convenience. It bears the edition number 3.1 |  |
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IEC 61156-1 Consol. Ed. 3.1 (incl. am1)
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