Add to Cart Quick view AT&T 3510-A1-001 Paradyne 3510 DSU Modem - 2261-SA1 AT&T Was: $49.50 Was: $125.00 AT&T 3510-A1-001 Paradyne 3510 DSU Modem - 2261-SA1 Condition: UsedThis used modem has been inspected and appears to be in good condition. It was pulled from a working env 15657 SKU: 15657 Weight: 6.00 LBS