Editing Call duration

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In [[telecommunications]], the term '''call duration''' has the following meanings: 

# In [[telephone]] systems, the [[time]] between (a) the instant a [[telecommunication circuit|circuit]], ''i.e.,'' [[off-hook]] condition at each end, is established between the [[call originator]] and the [[call receiver]] and (b) the instant the call originator or the call receiver terminates the call.
# In [[data transmission]], the duration of the [[information transfer]] [[phase (waves)|phase]] of an information transfer transaction.

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[[Category:Teletraffic]]
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