Using x2 10-5
Limiting the Lowest Possible Connect Speed
The &U command allows you to limit the lowest possible connect speed.
If a remote modem attempts to connect to your Courier with x2 at a speed
lower than &U, your Courier with x2 will not allow it to connect.
To limit the Use this command
Where x is
Lowest possible
connect speed
AT&U=x A value from 0 to 32
Note: See table 12.4 for a list of connect speed values.
Limiting a Range of Possible Connect Speeds
By setting &N and &U values, you can limit the range of speeds at which
your Courier with x2 connects. If a remote modem does not connect to
your Courier with x2 at a range between the speeds designated by the &N
and &U commands, your Courier 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 Then your modem
Equals
zero
Equals zero Connects at the highest possible
speed.
Is greater than
zero
Connects at the &N speed only.
Is greater
than zero
Is greater than
zero and greater
than &U
Connects at the highest possible
speed in the range from &U to &N.
Table 12.3 Constraints on Link Speed
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