Toshiba TECRA M5 User Manual page 191

Transmitting level
Receiving level
Input/output
impedance
Error correcting
Data compression
Power supply
User's Manual
-10 dBm
-10 to -40 dBm
600 ohms ±30%
MNP class 4 and ITU-T V.42
MNP class 5 and ITU-T V.42bis
+3.3V (supplied by computer)
Specifications
A-3