us robotics model no:3453 with charger

ITU V.92/V.90 up to 56 Kbps downloads Data: V.92, V.90, V.34, V.32bis, V.32, V.22bis, V.22, V.23, and V.21 ITU V.34 at 33.6 Kbps or 28.8 Kbps V.32 at 19.2 Kbps (21.6 Kbps between Courier modems with ASL) ITU V.32bis at 14.4 Kbps HST at 16.8 Kbps Compatible with most ITU and Bell standards down to 300 bps Data Error Control; Compression: V.42/V.42bis and MNP2-4/5 Fax: ITU V.17 at 14.4 Kbps, ITU V.29 at 9600 bps, ITU V.27ter at 7200 bps, Group III, TIA/EIA 578 Class 1, and TIA/EIA 592 Class 2.0