Busy line interrupt: Difference between revisions

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'''Busy line interrupt''', also known as '''emergency breakthrough''', is a function of telephone [[land line]] carriers in which a [[Switchboard operator|telephone operator]], by request of a caller, interrupts an existing phone conversation between other parties.<ref>[http://www.icc.illinois.gov/downloads/public/edocket/115077.pdf INWARD ASSISTANCE OPERATOR SERVICES]</ref>

{{uncat|date=October 2007}}

This is especially useful for services without [[call waiting]].

{{unref|date=October 2007}}

'''Busy line interrupt''' is a function on land line telephones that allows a caller to interrupt a phone conversation of another caller, especially if the caller does not have [[call waiting]].

Much like [[long distance calling]] before the late 90s1990s, busy line interrupt is a service provided in order to, for instance, to allow people to contact a family member in the event of an emergency if the receiving party's line is busy and the news cannot wait.

The service is not free. It is usually about $3 per use and is charged whether or not the calling party can reach the person on the other end (as the phone just might be off the hook for privacy reasons or the line mightcould be connectedbusy tocarrying thea [[internet]]modem call). For this reason, it is usually only used in cases of emergencysemergencies as noted above.

==References==

{{Reflist}}

==External links==

*[https://web.archive.org/web/20110612184515/http://www.patentstorm.us/patents/7133515/description.html US Patent 7133515 - Subscriber control of busy line interrupt and line treatment codes]

*[http://www.cox.com/support/gainesvilleocala/telephone/operator-dirassist.asp Operator Services & Directory Assistance]

*[http://www.qwest.com/wholesale/pcat/opservixc.html Operator Services - Interexchange Carriers - V5.0]

[[Category:Calling features]]

{{telephony-stub}}