<P>The voice network services of conferencing and transcoding previously were available only in the head-office Catalyst core. The Catalyst 4000 Access Gateway Module enables voice network services for the branch office, paving the way for the enterprise to deploy converged data, voice, and video applications throughout the organization. The voice network services functionality of the Access Gateway Module can be deployed with the existing Cisco wide area network (WAN) infrastructure, or with the voice gateway and IP routing capabilities of the Access Gateway Module to provide an integrated local area network (LAN)/WAN solution. An Integrated LAN/WAN solution is used in environments where time to deploy, ease of use, and reduced network complexity are valued. In environments where high WAN performance, diversity in protocols and interface types are required then the Catalyst 4000 would be deployed with stand-alone Cisco routers. </P>