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Standard for Signaling Devices for the Hearing Impaired

UL CSDS Proposal
Standard 1971, Edition 3 Edition Date: July 02, 2014
Summary of Topics m1638_5_20140702_sum.html

Subject 1638 (1971)

Bulletin Dated: July 2, 2014


The following changes in requirements to UL 1638 are being proposed for preliminary review and comment only:

1. For Preliminary Review Only: Proposed Fifth Edition of the Standard for Visible Signal Devices for Fire Alarm and Signaling Systems, Including Accessories

Back to Standard 1971, Edition 3

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