A Better Answer - ABA opened in May 1979 with 13 clients. The company has grown and plays an important role in the answering service industry in and around the Greater Baltimore business and medical communities. ABA installed STARTEL equipment utilized for operator-assisted programs.IVM VOICE MAIL enhances services for clients and RPT Voice Loggerequipment allows total review of every message to assure quality. ABA is backed up with generator power.