-> The phone in use thing is cool but you can't hang much off of PH. Co.
-> lines power without it messing things up so added complication
-> of independent power. The teleprotector is pretty much
-> a passive device using steering diodes.

 In the old days of Real Bells in phones and Power Gulping real Light
bulbs that was true. But in this day of Electronic Ringers and LED's it
is of little concern as a practical matter.
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