- outgoing trunk callback
- See callback queuing.
IT glossary of terms, acronyms and abbreviations. Faulkner Information Services . 2015.
outgoing trunk callback
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callback queuing — When outgoing calls cannot be completed due to busy trunk groups, the user s extension rings when a nonbusy trunk is available, signalling that the call can now be placed … IT glossary of terms, acronyms and abbreviations
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