Adtran offers a broad range of optional NetVanta voice, data, and disaster recovery plug-in modules to provide flexible connectivity options. The module plug into the rear of NetVanta routers to provide additional network connectivity. Module capabilities range from Nx56/64Kbps DS0 circuits to T3 Wide modules. The Adtran NetVanta Modules come in two sizes, normal NIM and 'wide.' Wide modules include the Octal T1 and T3 modules and fit in the 4000 and 5000 series of routers. All of our NetVanta NIMs and VIMs come with our standard one year warranty.