L7557 slics equivalent, low-power slics.
s Auxiliary input for second battery, and internal switch to enable its use to save power
s Low active power (typical 125 mW during on-hook transmission)
s Supports meter.
These electronic subscriber loop interface circuits (SLICs) are optimized for low power consumption while providing an extensive set of features.
The SLICs include an auxiliary battery input and a b.
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