Modem Speed Standards (ITU-T)
V.90
- Receive at 56 kbps but send at only 33.6 kbps
- Not all phone lines, ISPs support 56 kbps
- Fall back to 33.6 kbps if cannot support
V.34
- 33.6 kbps send and receive
V.32 bis
- 14.4 kbps send and receive
- bis means second (version of the standard)