The Basic Rate Interface (BRI) voice module for the Cisco MC3810 multiservice access concentrator provides four physical ports (four D channels and eight B channels) for ISDN BRI connections. This new MC3810 interface works with a variety of PBXs to reduce the costs of WAN communications. The MC3810-BVM4 interface enables multinational companies to take advantage of toll bypass and enjoy the benefits of data, voice, and video integration.