Call Waiting Deluxe is the Bellcore (now Telcordia Technologies) term for Type II caller ID with Disposition Options. This CLASS-based POTS-telephone calling feature works by combining the services of call waiting with caller ID but also introduces an "options" feature that, in conjunction with certain screen-based telephones, or other capable equipment, gives a telephone user the option to For more information, please see the Analog Display Services Interface article.