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The service is typically accessed by the user dialling a toll free number from any telephone (PSTN, call box, mobile phone etc.). The user then authenticates himself with the operator by entering a PIN, types in the digits of the number to connect to, and then is connected by the operator.
In contrast to emergency numbers, which are always toll-free, calls to such services may or may not be charged. Landline telephone companies' customer service numbers have been normalized as 103, followed by a two-digit code. For example, Embratel customers contact the company's customer service dialing 103–21. [13]
Previously, 06-0, 06-1000 and 06-4 were used for toll-free numbers, 06-8 for shared cost, 06-9 for premium rate, and other 06-numbers for mobile numbers. 0011 and later 06-11 was used for emergency services before this changed to 112. 09 was used as the international access code before this changed to 00.
By the 1980s, computerisation of the system allowed British Telecom "Linkline" 0800 freephone numbers and AT&T +1-800- toll-free numbers to be controlled by a database and terminated virtually anywhere with each inbound call itemised and billed individually. This smart network was further refined to provide toll-free number portability in the ...
Companies requested to have their toll-free number listed, and paid the providers each time their phone number was released to a toll-free directory-assistance caller. In 1999, AT&T applied for permission to discontinue this service, [ 2 ] but it remained active until the summer of 2020.
Originally, there was only one provider of landline telephony, ... Special numbers 3; 12. Toll free numbers: 080 13. Televoting: 089 14. Commercial numbers: 090 15.
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