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What is the minimum ring Voltage the ION8650 modem can detect?

Issue
What is the minimum ring Voltage the ION8650 modem can detect?

Product Line
ION8650
ION8600

Environment
Modem communications

Resolution
The vendor specification for RING detection use the frequency range from 15Hz to 68Hz and a DC offset of 35V and above with up to 100V RMS RING. This range covers 99.99% of all real world ring scenarios and there are no approval agencies that we are aware of that are outside of that range. Normal ring offset is usually 37V to 48V DC with a ring voltage less than 100V RMS.

We have tested 15V RMS and have been able to detect RING, but the test equipment was generating a perfect 20 Hz sine wave for TIP and RING and they are opposite of each other. Not every provided TIP/RING signal will be perfect (or even a sine wave) so that would change the actual RING detect voltage. Firmware version 1.02u was tested at 14 Hz and tested to 20 V and 68 Hz tested to 19 V.
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