User's Manual

The 56K Technology
The V.90 modem represents the latest V.90 technology. This allows receive
data rates of up to 57.333 kbps over PSTN (public switched telephone
network) only in connection with equipment-compatible ISPs (Internet Service
Provider): however, due to the limited power levels of the PSTN the receive
speed is limited to 54 kbps.
Figure 1 Connection Modem to Modem
analog digital analog
Modem Switch Switch Modem
Figure 2 Connection Modem to Internet Service Provider ISP
analog digital
Modem Switch Internet Provider ISP
General Description
• Up to 54 kbps receive data rates in V.90 mode
• Fax send and receive up to 14400 bps
• (Fax group 3, according to V.29, V.27ter, V.17)
• Max. transmission speed up to 33.6 kbps
• Asynchronous communication between modem and computer
• V.42bis data compression
• V.42 and MNP2-4 error correction
• Effective data rate up to115.200 bps (V.34 and V.42bis)
• Number storage for 4 telephone numbers
• Automatic baudrate-adaption up to 115.200 bps
• AT-command set
• Voice capabilities
• Internal speaker
• Win 9x PnP
1-2 INTRODUCTION