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• �• . � - . - <br />.. ., .. ,.�.: .�M,. , , . .. <br /> }= . <br /> '. � ����� <br /> �nV@il�f?d �f3t"�i'��.' <br /> D928 Dua! Phone Line Switcher <br /> ► Automatically switches to alternate phone line <br /> ► AC Power LED <br /> °� ► Primary and Secondary Phone Troubie LEDs <br /> ti+ � ► Communication Fail LED <br /> 7�:%�'::s., ¢ <br /> „:�2 <br /> ��:»t <br /> f <br /> 3�d; � � <br /> � <br /> i °ayyP�.,�,,.� •�;;'` `� <br /> '�+:,:�°°��', . <br /> ,.. °�. <br /> Ali reporting fire alarm systems are required to have a Four LEDs mounted on the front edge of the D928 serve <br /> primary and alternate means of transmitting reports to a as status LEDs by displaying primary and alternate phone <br /> receiver The D928 Dual Phone Line Switcher allows the line failure,failure to communicate, and AC power status <br /> control panel to operate over and supervise two separate <br /> phone lines Typical applications are schools, factories, <br /> and care facilities where the ability of the system to relay <br /> information off-premises is especially critical for <br /> safeguarding life and property. <br /> Functions <br /> System Operation <br /> If a signal is generated and the control panel senses that <br /> the primary phone line is bad,then it uses the alternate <br /> phone line to send the message. If trouble is detected,the <br /> control panel keeps the faulty phone line in memory <br /> If the primary line is found to be electrically faulty, the <br /> D928 switches to the alternate phone line and reports the <br /> fault.The D928 uses the primary or alternate phone line <br /> to dial a primary, backup,or duplicate phone number <br /> When using the Modem Illaz communication format,the <br /> control panel sends a phone line failure message to the <br /> D6100i or D6600 Receiver, indicating which phone line is <br /> in trouble. The control panel sends two distinct messages <br /> for trouble on the primary or alternate phone line <br /> www.boschsecurity.com <br />