Advanced Call Center - Version 3.6 An advanced, yet simple-to-use software answering machine for your voice modem. All the features you'd expect are supported: call monitoring and logging, Caller ID with pop-ups and voice alerts, "white" and "black" lists, customizable and personalized greetings, and conversation recording. ACC can send call notifications to your pager and voice messages over e-mail. It can also block certain types of incoming calls, even without Caller ID information. ACC provides tight integration with sound cards and doesn't require an extra speaker attached to the modem.