Assertion: phone | /r/HasProperty | equipped with bell
Facets:
value: in a ringer box
type: LOCATION
Source sentences:
text: Exchange operation soon resulted in telephones being equipped with a bell in a ringer box, first operated over a second wire, and later over the same wire, but with a condenser (capacitor) in series with the bell coil to allow the AC ringer signal through while still blocking DC (keeping the phone "on hook").