| Manufacturer | Zhone Technologies |
| Manufacturer Part # | 3920-A1-401 |
| Cost Central Item # | 10341232 |
| Product Description | Paradyne COMSPHERE 3920Plus - Modem (analog) - external - RS-232 - 33.6 Kbps |
| Device Type | Modem (analog) - serial RS-232 |
| Enclosure Type | External |
| Approximate Dimensions (WxDxH) | 7.6 in x 12 in x 2.2 in |
| Approximate Weight | 2.4 lbs |
| Max Transfer Rate | 33.6 Kbps |
| Protocols & Specifications | ITU V.21, Bell 212A, ITU V.22, ITU V.22bis, ITU V.29, ITU V.32, ITU V.32bis, ITU V.34, ITU V.17, ITU V.23 , Hayes AT command set |
| Error Correction Protocol | MNP-4 |
| Data Compression Protocol | MNP-5, ITU V.42bis |
| System Requirements | Microsoft DOS, Microsoft Windows 3.x/95/98 |