Ericsson ZAT 19.2 Operation Manual page 295

ITU-T V.23 (1200 bit/s)
Frequency shift keying (FSK) around the frequencies 1700 Hz and 420 Hz
The bandwidih of the telephone network
Back channel Main channel
Hz
15.4 Transmission standards and modulation
ITU-T V.22 bis 1200Hz 2400 Hz QAM 2100 Hz
ITU-T V.22/1200 | 1200Hz 2400 Hz 4DPSK 2100 Hz
Bell 212A 1200Hz 2400 Hz 4DPSK 2225 Hz
ITU-T V.22/600 | 1200Hz 2400 Hz 2DPSK 2100 Hz
ITU-T V.21 1080 +100Hz {1750 +100Hz |FSK 2100 Hz
ITU-T V.23 1700 +400Hz | 1700 +400Hz | FSK 2100 Hz
ITU-T V.32 bis' | 1800 Hz 1800 Hz QAM 2100 Hz
V.32 terbo 1800 Hz 1800 Hz QAM 2100 Hz
Bell 103 1170 +100Hz } 21250 +100Hz | QPSKSK 2225 Hz
FSK Frequency Shift Keying
DPSK Differential Phase Shift Keying
QAM Quadrature Amplitude Modulation
* {TU-T V.32 bis uses echo canceling technique for channel separation, i.e. the originating and
answering modem have the same carrier frequency, and uses the full bandwidth of the
telephone network.
LZTR104006 R1.00 15-7
Zatt4.4/14.4-7 and 19.2/19.2-7