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All
Trunks Busy (ATB)
This is what the call center
manager sees if there were ever a situation where
all trunks were filled with callers or patches. What
this means is all available lines are currently
occupied with callers or data. Therefore no calls
can come into the system.
With our company, The
Successful Office Group, we do not get ATB signals
any longer as we have numerous PRI lines set up to
handle any sudden increase in call volume.
ATB signals were more common
place when regular d.i.d. (direct inward dialing)
lines were utilized. Before T-1 and then PRI lines
became available, D.I.D. lines were commonplace in
the call center and answering service industry.
In fact before 1980 all
answering services used D.I.D. lines, as this was
the then state of the art equipment.
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answering service
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Call
Center Terms
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