User manual

CHAPTER 1： MODEM INTRODUCTION
Table 1-1A : Modem operating mode (4 wires/2wires L-L or D-L)
Operating Mode MOD. Carrier Symbol
rate
Constellation
points
V.34+ 33600
V.34+ 31200
V.34 28800
V.34 26400
V.34 24000
V.34 21600
V.34 19200
V.34 16800
V.34 14400
V.34 12000
V.34 9600
V.34 7200
V.34 4800
V.34 2400
SM
SM
SM
SM
SM
SM
SM
SM
SM
SM
SM
SM
SM
SM
(Table 1-1c)
(Table 1-1c)
4 to 1024
Depends on the
combination of
data rate,
symbol rate and
constellation
expansion
chosen.
V.32bis 14400 T TCM 1800 2400 128
V.32bis 12000 T TCM 1800 2400 64
V.32 9600 T TCM 1800 2400 32
V.32 9600 QAM 1800 2400 16
V.32bis 7200 T TCM 1800 2400 16
V.32 4800 QAM 1800 2400 4
V.26bis 2400 DPSK 1800 1200 4
V.26bis 1200 DPSK 1800 1200 4
V.22bis 2400 QAM 1200/2400 600 16
V.22 1200 DPSK 1200/2400 600 4
V.23 1200/75 FSK 1700/420 1200 N/A
V.21 0-300 FSK 1080/1750 300 N/A
BELL 212A 1200 DPSK 1200/2400 600 4
BELL 103 0-300 FSK 1175/2125 300 N/A
4