Recall dial tone-13 dBm0 3 bursts of 0.1 s followed by a continuous tone (note c) Recall dial tone Modern PABX only (note g)-16 dBm0 3 bursts of 0.1 s followed by a continuous tone (note c) Busy ...
The M-980-02 is a general-purpose call progress tone detector operating from 2.8 to 5.5 VDC power supply range. It covers the common call progress frequency from 315 to 640 Hz featuring an inexpensive ...
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