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An operator-assisted call is one in which the calling party places a telephone call which requires an operator to provide some form of assistance in completing the call. This may include telephone calls made from pay phones, calls placed station-to-station, person-to-person, collect, third number calls, calls billed to a credit card, and certain international calls which cannot be dialed directly. The telephone operator may also be able to assist with determining what kind of technical difficulties are occurring on a phone line, to verify whether a line is busy (Busy Line Verification, or BLV), or left off the hook, and break in on a phone line to request for the caller to clear the line for an incoming call (Busy Line Interruption, or BLI). The latter service is often utilized by emergency police. In addition, operators are often a first point of contact for the elderly wanting information on the current date and time.
Operator-assisted calls can be more expensive than direct dial calls.
A person-to-person call is an operator-assisted call in which the calling party requests to speak to a specific party and not simply to anyone who answers. The caller is not charged for the call unless the requested party can be reached. This method was popular when telephone calls were relatively expensive. The alternative, in which the calling party agrees to talk to whoever answers the telephone, is known as station-to-station. Since the introduction of direct dial telephone service and the subsequent drop in the price of long distance telephone calls, person-to-person service has virtually disappeared.
An operator-assisted conference call or op assist call is one in which the conference call is managed by an operator. The telephone operator will greet each call participant, gather specific information from each participant, introduce key speakers, and manage questions and answers, all from the telephone.
A third number call or third party call is an operator assisted telephone call that can be billed to the party other than the calling and called party. The operator calls the third number for the party to accept the charges before the call can proceed.
Time and charges was a service often requested of the operator before a call begins. After completion of the call, the operator calls back and specifies the length of the call (in minutes) and the charge for the call. While it was used by guests in a residence or business to compensate the host for use of the phone, it was almost always requested by hotel switchboards so that they could bill the room occupant for the charges before the occupant checked out. Modern telephone systems in hotels make this unnecessary, as the calls are rated automatically by the hotel or by a service provider the hotel has contracted with. (Hotels often contract with resellers that charge unusually high rates, with the profit shared between the reseller and the hotel, thus helping the hotel defray the cost of the telephone system.)
List of operator assistance numbers
- 00-1188 (international)
- Hong Kong
- 10010 (local)
- 10013 (international)
- North American (North American Numbering Plan)
- 0 (local)
- 00 – (long distance provider; after AT&T breakup)
- United Kingdom
- 155 (international)