With the expansion of personal communication networks, wireless traffic is expected to grow rapidly. To cope with this situation, we investigate the issue of how to support wireless voice communications efficiently in personal communication networks with distributed queue dual bus networks as backbones. In the backbone networks, pre-arbitrated slots generated at constant intervals are preferred to carry voice traffic with stringent delay requirements. However, they are not utilized as efficiently as queued arbitrated slots, which are allocated on demand. To solve this problem, we propose a new pre-arbitrated slot access scheme, distributed slot reuse with silence detection, which can greatly improve utilization by taking advantage of two features in voice communications, silence detection and source/destination locality. In addition, we prove the scheme's correctness, design an algorithm to solve its related problem of virtual circuit identifier type selection and discuss its implementation details. Simulations are performed to show that the new scheme is much better than two previous schemes in terms of bandwidth utilization and drop rate.