A direct marketing technique.. Definition..

1. Telemarketing

2. Telemarketing (sometimes known as inside sales, or telesales in the
UK and Ireland) is a method of direct marketing in which a
salesperson solicits prospective customers to buy products or
services, either over the phone or through a subsequent face to face
or Web conferencing appointment scheduled during the call.
Source : https://en.wikipedia.org/wiki/Telemarketing
A telemarketer is a person who is responsible for selling a product
or service over the phone. Telemarketers may work in a private
office, from a call center or from home. It is often the case that
telemarketers never meet their customers face to face, so good
telemarketing skills are of utmost importance to achieving success
as a telemarketer.
Source : http://www.wikihow.com/

3. DEFINITION of 'Telemarketing'
The act of marketing goods or services to potential customers over the
telephone. Telemarketing may either by carried out by telemarketers, or
increasingly, by automated telephone calls or "robocalls."
Read more: Telemarketing Definition | Investopedia http://www.investopedia.com/terms/t/telemarketing.asp#ixzz3nxAGpWpw

4. TELEMARKETING IS: A service that generates interest,
creates opportunities, provides information, factors customer
feedback, makes appointments and produces leads by
telephone.
Source :www.virtual-sales.com