Connection | Modulation | Bit-rate [kbps] | Year Released |
110 baud Bell 101 modem | FSK | 0.1 | 1958 |
300 baud (Bell 103 or V.21) | FSK | 0.3 | 1962 |
1200 modem (1200 baud) (Bell 202) | FSK | 1.2 | |
1200 Modem (600 baud) (Bell 212A or V.22) | QPSK | 1.2 | 1980 |
2400 Modem (600 baud) (V.22bis) | QAM | 2.4 | 1984 |
2400 Modem (1200 baud) (V.26bis) | PSK | 2.4 | |
4800 Modem (1600 baud) (V.27ter) | PSK | 4.8 | |
9600 Modem (2400 baud) (V.32) | QAM | 9.6 | 1984 |
14.4k Modem (2400 baud) (V.32bis) | TCM | 14.4 | 1991 |
28.8k Modem (3200 baud) (V.34) | TCM | 28.8 | 1994 |
33.6k Modem (3429 baud) (V.34) | TCM | 33.6 | 1996 |
56k Modem (8000/3429 baud) (V.90) | PCM | 56.0/33.6 | 1998 |
56k Modem (8000/8000 baud) (V.92) | PCM | 56.0/48.0 | 2000 |