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;lt;!-- NEW! --;gt;IEC 62149-4:2022 is available as ;lt;a href="https://webstore.iec.ch/publication/81017";gt;IEC 62149-4:2022 RLV;lt;/a;gt; which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.;lt;/br;gt;;lt;/br;gt;IEC 62149-4:2022 defines performance specifications for 1 300 nm fibre optic transceiver modules used for the ISO/IEC/IEEE 8802-3 Gigabit Ethernet application. This document contains definitions for product performance requirements as well as a series of tests and measurements, for which clearly defined conditions, severities and pass/fail criteria are provided. The tests are intended to be run on a "once-off" basis to prove any product's ability to satisfy the performance standard's requirements. A product that has been shown to meet all the requirements of a performance standard can be declared as complying with the performance standard but will then be controlled by a quality assurance/quality conformance program. This third edition cancels and replaces the second edition published in 2010. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: - the normative references are updated; - the condition "for short periods" in 4.1 is removed; - the absolute limiting rating for soldering temperature in Table 1 is modified; - the maximal optical output power (multimode fibre) in Table 4 is increased from −3,5 dBm to −3 dBm, to align value with the referenced document; - a note is added to Table 7 to clarify that out-of-specification products are not allowed to pass the performance tests.