The NEC DSX-80/160 1091001 4-Port CO Line Card card supports 4 analog loop start CO-Telco lines. Each Card also provides two power failure cut-through circuits. If AC power fails, the Card automatically cuts through two line circuits to two power failure single line telephones
The NEC DSX 1091001 4-Port CO Line Card features four additional CO line ports with built-in Caller ID, and can only be installed in the bottom expansion slot for a system maximum of 8 outside line ports.
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