Information AboutCaller Id |
| CATEGORIES ABOUT CALLER ID | |
| calling features | |
| authentication methods | |
| telephone service enhanced features | |
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Caller ID is also known as Calling Line Identification (CLI) when provided via an ISDN connection to a PABX , while in some countries, the terms '''Caller Display''', '''Calling Line Identification Presentation''' (CLIP), Call Capture , or just '''Calling Line Identity''' (CLID) are used; '''Call Display''' is the predominant name used in Canada . CID originated with Automatic Number Identification (ANI) in the U.S. This is not to say that CID and ANI are the same thing. Caller ID is made up of two separate entities: the calling number and the billing (or subscriber) name. When a phone switch sends out a number, the remote telephone company is responsible for looking up the name of the subscriber in a common database. Additionally, nothing ensures that the number sent by a switch is the actual number where the call originated. It is very easy for a telephone switch to send any digit string it requests to the system. For example, if the originating PBX (say, from an office with an ISDN PRI line) sends out 2024561414 as the ANI, then the remote caller ID box will display the White House on the terminal device.
Generally, Caller ID between different countries is not transmitted, meaning that the equipment with Caller ID will simply display either 'UNAVAILABLE' or 'INTERNATIONAL'. However, Caller ID between countries is becoming more widely available, meaning that a telephone number in another country will be displayed, complete with the Country Calling Code . This is usually the case with mobile phones, particularly when a subscriber is roaming overseas. However, the overseas number may be compressed into a 'domestic' format, meaning that the number may not be recognisable to the called party. For example, a US number 1 646 555 1212 may be displayed in the UK as 0646 555 1212, instead of 001 646 555 1212. Telemarketing organisations often block the display of their calling numbers. Some states and countries require telemarketers to display a contact number that can accept complaints, as the individual caller numbers may not be able to be called. Many Internet service providers (ISPs) providing dial-up access require the customer to use CLI to prevent abuse of the account by unauthorised callers. DISABLING CALLER ID
In Hungary on mobiles you have to use #31# to disable TYPE II CALLER ID In 1995, Bellcore released another type of modulation similar to Bell 202 in which it became possible to transmit Caller ID information and even provide call-disposition options while the user was already on the telephone. This service became known in some markets as Call Waiting ID or when it was combined with call-disposition options; Call Waiting Deluxe . VALUES IN DESIGN
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