Apple IMAC User Manual - Page 48

Basics Modem - 3 2 If you have a modem that supports this higher speed protocol, you can theoretically download data at up to 56,000 bps. With these 56K protocols, however, your upload speed is still going to occur at V.34 speeds (up to 33.6) because the digital equipment is only on your ISP's end. While the technology theoretically can achieve download speeds up to 56 kbps, current FCC rules limit the power output of modems such that you probably will not achieve that maximum speed. The maximum speed possible under this regulation is 53 Kbps. Users who have unstable phone lines are finding they still can't get speeds above what they were getting with their V.34 28.8/33.6 modem. Remember that your phone line quality is the most important factor here, and many people who have poor quality telephone line conditions will almost