Primary purpose of this article is to Discuss on Popular and Effective Tool. Telemarketing service has emerge as a popular and effective tool more and more companies are sympathetic this system. Telemarketing outsourcing has become a key factor in the sales initiative of a company. Third party telemarketing firms have tie-up with many companies for the sales of their special range of products and services. Telemarketing service hiring is the most ordinary things done by companies all over the world. Create a financial plan for the telemarketing services and also make a note on the expected call volume.