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Standard 1971, Edition 3

Standard for Signaling Devices for the Hearing Impaired

UL CSDS Proposal
Standard 1971, Edition 3 Edition Date: May 01, 2014
Summary of Topics b1971_3_20140501_sum.html

Subject 1971

Bulletin Dated: May 1, 2014


The following changes in requirements to the Standard for Signaling Devices for the Hearing Impaired, UL 1971, are being proposed for preliminary review and comment only:

1. For Preliminary Review Only: Correction to Synchronization of Light Output

2. For Preliminary Review Only: Compatibility Documentation and Alternate Delivery Methods

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