ADTRAN 42000820E1#M NetVanta 3430 T1 DBU Router is a business‑class router from ADTRAN configured with a T1 DBU card. The part number 42000820E1#M identifies this NetVanta 3430 model. It provides T1‑based WAN connectivity through the included T1 DBU card, suitable for small‑ to mid‑size deployments requiring reliable wide‑area networking over T1 lines.
