West provides inbound, outbound and interactive voice response, CRM services and Internet-based customer care and acquisition services.

Firm specializing in telephone market research and data collection.

North America's premier outsourced business-to-business call center offering a complete range of telephone and web-based telemarketing and customer support services.

ISC provides consulting, optimization studies, workforce management recommendations, and other professional services to call centers.

A comprehensive directory of products, services, and relative information for the telemarketing and call center professional.

National call-center and service bureau for the publishing industry, including controlled circulations and sales of specialty publications. Also offers lead qualification, appointment setting, and market research for all industries and non-profits.