Frame Relay Access Routing for Brance Office Connectivity and Disaster Recovery

The NetVanta 3000 Series of access routers from ADTRAN, offers the most cost-effective way to connect branch offices together using Frame Relay. These versatile platforms are modular in design and are a full-featured, low-cost alternative to other brand name routers. They include a single slot used to house a variety of interchangeable Network Interface Modules (NIMs) and Dial Backup Interface Modules (DIMs)

As the diagram indicates, the corporate site houses a NetVanta 3205 connecting a full T1 to a public Frame Relay network. This connection requires a T1/FT1 and DSX-1 NIM to carry digital voice and data, and it also includes an ISDN BRI DIM for added disaster recovery security. At the first branch office, the NetVanta 3200 is equipped with a T1/FT1 NIM and terminates a fractional T1 for data applications. A 64K line is terminated at the second office using a NetVanta 3205 that includes a 56/64K NIM. At the third branch office, a full T1 is needed to carry both digital voice and data traffic, therefore requires a NetVanta 3200 equipped with both a NIM and a DIM. A T1/FT1 with DSX-1 NIM is used to terminate the T1 and the DSX-1 interface is used to drop-off the digital voice to a local PBX. If the primary link is comprised, ADTRAN's Safe-T-Net disaster recovery solution will dial around the failed network using the ISDN BRI DIM, allowing for quaranteed bandwidth for mission critical applications like digital voice.