Changing the V.34 setting
The V.34 setting is the modem protocol that the device uses to send faxes. It is the
worldwide standard for full-duplex modems that send and receive data across telephone
lines at up to 33,600 bits per second (bps). The factory-set default for the V.34 setting is On.
You should change the V.34 setting only if you are having trouble sending or receiving a fax
from a particular device. Turning off the setting might be useful when you are trying to send
a fax overseas, or receive one from overseas, or if you are using a satellite telephone
connection.