1991年4月1日 · Please refer to Sections 57 and 59 of UL Standard 1459. The first violation is, the standard allows sound levels in excess of 115 dBA and it allows it for and indeterminate …

ul 1459 bulletins-2001 适用范围 涵盖电信（电话）设备，例如电话应答设备、住宅电话仪器、电话拨号器、无绳电话、按键系统和专用交换分机设备，旨在以电气方式连接到具有对地工作电压 …

2000年6月1日 · Overvoltage testing was introduced in UL 1459 Safety of Telephone Equipment, Second Edition in the late 1980s. The evolution of ITE and telecommunications equipment …

1995年9月21日 · Find the most up-to-date version of 1459 at GlobalSpec.

The UL enterprise[4] is a global private safety company headquartered in Northbrook, Illinois, composed of three organizations, UL Research Institutes, UL Standards & Engagement and …

2013年11月25日 · See OSHA's informational web page for each NRTL to determine its current scope of recognition. Gas Insulated, Metal Enclosed Disconnecting, Interrupter and Grounding …

2019年6月11日 · 1.13 Units intended for connection to telecommunication equipment are to have the appropriate assembly containing such circuitry meet CAN/CSA C22.2 No. 225 and UL …

There is a UL Classification document for each of our UNIQUE Fire Stop Systems applications. Click on any link below to view the UL ratings. All have been tested to UL 1479 standards. The …

UL 1459 Ed 16 outlines various requirements that audio/video and musical instrument apparatus must meet to obtain UL certification. These requirements include: Electrical insulation and …

UL 安全电话设备标准（01/31/2001（8p）；01/12/2001（2p））, UL Standard for Safety Telephone Equipment (01/31/2001 (8p); 01/12/2001 (2p)), 提供UL 1459 BULLETINS-2001的 …