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Work item:
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K.21 (2019) Amd.1 (ex K.21 Amd.1)
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Subject/title:
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Amendment 1 to Recommendation ITU-T K.21: Resistibility of telecommunication equipment installed in customer premises to overvoltages and overcurrents
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Status:
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Approved on 2020-06-29
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Approval process:
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AAP
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Type of work item:
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Recommendation
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Version:
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-
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Equivalent number:
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-
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Timing:
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-
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Liaison:
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-
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Supporting members:
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-
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Summary:
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Amendment 1 to Recommendation ITU-T K.21 refers to Annex A. Annex A applies to special environments, one factor being that the primary protection has a poor earth connection that does not meet the requirements of Recommendation ITU-T K.66. This condition is simulated by increasing the STP earth resistance (R1) from zero to 100. People have missed this change, possibly because the test circuit diagram is in Recommendation ITU-T K.44. To alert readers of this a text note has been inserted in the Comments column.
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Comment:
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-
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Reference(s):
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Historic references:
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Contact(s):
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| ITU-T A.5 justification(s): |
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First registration in the WP:
2020-05-26 09:54:14
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Last update:
2020-07-07 13:39:59
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