This paper examines the performance of a quality-based voice/data CDMA system where new and handoff calls are considered. A call request for handoff data queues up if the signal-to-interference ratio exceeds a predefined threshold while priority is given to handoff voice calls by exclusively reserving some channels for them. The transmission rate of data users may vary according to measured SIR value. The transmission power of voice and data users may be different. Important performance measures of the system such as blocking probability and system capacity for voice and data calls are also compared for different schemes.