4 ms·
48VDC is specified, but in my experience, it varies. The bottom of the article says the same: On-hook voltage: 40-50 V DC
by anonymousiam 3y ago
48VDC is specified, but in my experience, it varies. The bottom of the article says the same:
On-hook voltage: 40-50 V DC
- gumby 3y agoPretty sure from memory AT&T spec’d negative voltage to reduce corrosion.
- anonymousiam 3y agoAh. I did not see that you meant to emphasize the negative vs. positive voltage. It's true that it's negative, but given that phones are polarity independent, it doesn't really matter. I was expressing the voltage as an absolute value.