Multiple choice technology testing IBLs feature that is unavailable in IBLc Visual Call Waiting Auto-Attendant Call Trace Outgoing Caller ID Reveal answer Fill a bubble to check yourself B Correct answer Explanation Auto-Attendant is a feature available in IBLs but not supported in IBLc, representing a key functional difference between the two service offerings. Visual Call Waiting, Call Trace, and Outgoing Caller ID are features available in both platforms.