Compatibility With Manual Offices
Panel was installed in cities where many people still had manual (non-dial) service. Calls from panel offices to manual offices required PCI signals to tell the "B Board Machine Incoming" operator or incoming operator the phone number. The number appeared on a lit display (or indicator). The operator completed the call in the usual way.
Calls from manual offices to panel offices required the "A board" or outgoing operator to request the number from the caller, connect to an idle trunk to the distant exchange and relay to the "B Board Manual Incoming Call" operator the desired number. The "B Board Manual Incoming Call" operator would then key in the desired number. The Panel machine would then setup the incoming and final frames to the called telephone number.
Read more about this topic: Panel Switch
Famous quotes containing the words manual and/or offices:
“A great deal of unnecessary worry is indulged in by theatregoers trying to understand what Bernard Shaw means. They are not satisfied to listen to a pleasantly written scene in which three or four clever people say clever things, but they need to purse their lips and scowl a little and debate as to whether Shaw meant the lines to be an attack on monogamy as an institution or a plea for manual training in the public school system.”
—Robert Benchley (1889–1945)
“He has erected a multitude of new offices by a self-assumed power, & sent hither swarms of officers to harass our people & eat out their substance.”
—Thomas Jefferson (1743–1826)