A canonical data model (CDM) is a type of data model that presents data entities and relationships in the simplest possible form. It is generally used in system/database integration processes where data is exchanged between different systems, regardless of the technology used. A canonical data model is also known as a common data model.
A telephone company (telco) provides telephone and data communication services. Most telephone companies offer Internet/telephone packages for a fixed monthly fee. Bundled telephony services are usually cheaper than individual services.This term is also known as telecommunications operator, communications service provider (CSP) and, in the U.S., local exchange carrier (LEC).
Customers use telco services for local, long distance and international phone calls. Fees for long distance and international calls are usually higher than local calls. Additionally, fees are usually charged for phone line rentals. There are also services with discounts for certain call types, including local, long distance and international calls.
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