Local AMA
In local AMA (LAMA) all this equipment was located at the Class 5 office. In this case, it also recorded the completion of local calls, thus obviating message registers. For detail billed calls, the punch recorded both calling and called numbers, as well as time of day. For message rate calls, only the calling number and time of day.
In some electromechanical offices in the 1970s, the paper tape punch recorders were replaced by magnetic tape recorders. Most punches remained in service until the exchange switch itself was replaced by more advanced systems. Stored program control exchanges, having computers anyway, do not need separate AMA equipment. They sent magnetic tapes to the Accounting Center until approximately 1990, when data links took over this job.
Read more about this topic: Automatic Message Accounting
Famous quotes containing the word local:
“His farm was “grounds,” and not a farm at all;
His house among the local sheds and shanties
Rose like a factor’s at a trading station.”
—Robert Frost (1874–1963)