NCO Group Inc. of Horsham, a provider of business outsourcing services, has acquired Protocol Global Solutions Inc. of Sarasota, Fla., for an undisclosed amount.

Both companies specialize in business process outsourcing services. NCO's focus is on accounts-receivable and customer-relationship management. Protocol's is in contact center services for the energy, health-care, government, pharmaceutical and insurance industries.

NCO's president and chief executive officer, Ronald A. Rittenmeyer, said the purchase of Protocol, which has 2,200 employees in the United States and internationally, will enhance market penetration and abilities for growth in the field of customer-relationship management.

NCO has 30,000 employees.    - Diane Mastrull