56 kbps Modems
What they can do
- Send at 33.6 kbps (V.92 with PCM upstream can go up to 48 kbps)
- Receive at 56 kbps (V92 with V.44 compression can go up to 120 kbps)
Problems
- past: competing standards from Rockwell, U.S. Robotics (V.90 ended them)
- present: ISPs must support V.92 (all support V.90)
Users and ISPs
- Users V.90 analog modem or V.92
- ISPs V.90 digital modem or V.92