Connecting Power Backup Lines; Figure 3.27 Connecting Power Backup Line To A 8/16Sli Board - Samsung OfficeServ 7400 Installation Manual

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3.4 Connecting Power Backup Lines

If AC power is fails while no battery is connected, connect a power backup circuit by
connecting C.O. lines to extensions.
If a pair of any C.O. lines(8TRK) is connected to pin1 and pin2 of the first port in 16SLI or
8SLI, lines are connected to general phones through pin4 and 5 of 8TRK. In power failure,
emergency calls can be available since the C.O. line is directly connected to the phone
connected to pin4 and 5 through pin1 and 2 of SLI by the internal relay operation.
5 4
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Figure 3.27 Connecting Power Backup Line to a 8/16SLI Board

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