Limiting A Range Of Possible Connect Speeds - US Robotics Courier V.Everything x2 Addendum Manual

Limiting a Range of Possible Connect Speeds

By setting &N and &U values, you can limit the range of speeds at which your
Courier I-modem with x2 connects. If a remote modem does not connect to
your Courier I-modem with x2 at a range between the speeds designated by the
&N and &U commands, your Courier modem with x2 will not allow it to
connect.
Note: The link speed associated with the &U argument cannot be greater than
the link speed associated with &N argument.
Use the following table to understand the relationship between &U and &N
commands:
If &U And &N
Equals zero Equals zero
Is greater than zero
Is greater Is greater than zero
than zero and greater than &U
Table 3 - Constraints on Link Speed
Then your modem
Connects at the highest possible speed.
Connects at the &N speed only.
Connects at the highest possible speed
in the range from &U to &N.
Courier V.Everything x2 Addendum 7