Basic HTML version of Foils prepared 5 February 98
| 1 | asymmetrical : 56 Kbps (downstream); 33.6 Kbps (upstream) |
| 2 | currently there is no standard covering 56 Kbps modems. It will take a year or more for the ITU to ratify a standard. At the moment there are 2 proprietary and incompatible specifications: X2, developed by US Robotics, and K56flex by Lucent and Rockwell Semiconductors Systems. |
| 3 | about 70% of the 56K modems use 56Kflex technology. Recently 28 data communications and computer vendors created Open 56K Forum which intends to push 56Kflex technology as new standard. |
| 4 | Cost: $129-$500 |