at command question

[Kirk Wood]

The "hayes" command for volume level is l0 through l3. At l0, the speaker
is muted. At l3 it is at maximum volume. You can use l1 and l2 for
intermediate levels. All commands are proceeded by the at directive. And
all commands can be stacked in a single at directive (ex: at&f1l2).

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Kirk Wood
Cpt.Kirk at 1tree.net

Nothing is hard if you know the answer or are used to doing it.