The Phreakers Hanbook 05
eZine lover (@eZine)
Published in
The Phreakers Hanbook
· 28 Dec 2019
Other Fone Information ====================== Voltages & Technical Stuff -------------------------- When your telephone is ON-HOOK, there is 48 volts of DC across the tip and the ring. When the handset of a fone is lifted a few switches close which cause a loop to become connected between you and the fone company, or OFF-HOOK. This is also known as the local loop. Once this happens, the DC current is able to flow through your fone with less resistance. This causes a relay to energize which causes other CO equipment to realize that you want service. Eventually, you will end up with a dial tone. This also causes the 48 VDC to drop down to ...