CALEA, October 1994
… a telecommunications carrier … shall ensure that its equipment, facilities, or services … are capable of … expeditiously isolating and enabling the government, pursuant to a court order or other lawful authorization, to intercept … all wire and electronic communications carried by the carrier within a service area to or from equipment, facilities, or services of a subscriber of such carrier concurrently with their transmission to or from the subscriber's equipment, facility, or service, or at such later time as may be acceptable to the government …