The D928 Dual Phone Line Switcher is used with the D9412GV2 Listed UL864 9th Edition, D7412GV2 Listed UL864 9th Edition, D9412G, D7412G, D9412, D9112, D7412, D7212, D9124, D9112B1, and D7212B1 Control Panels.
Before installing the D928, you should be familiar with the operation and installation guide and the program entry guide for the control panel you are installing. For additional installation information, refer to the D9412GV2/D7412GV2 Approved Applications Compliance Guide (P/N: F01U003639).
When the D928 is installed, the control panel alternates between Phone Line 1 and Phone Line 2 to send its first report. For example, on Day 1, the control panel attempts to communicate on Phone Line 1. On Day 2, the control panel switches and attempts to communicate on Phone Line 2.
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Radionics Dual Phone Line Switch Module D928$8.46
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