Wanted: wise way to limit the lines tip uses at certain speeds

[Arthur David Olson]

All of our dial-out modems can handle 1200 baud;
only some of our dial-out modems can handle 2400 baud.
When a user types
	tip systemname
we'd like the call to go out on any available modem,
while if they type
	tip -2400 systemname
we want to ensure that the will go only to a modem that can handle 2400.
If you know the wise way of achieving the goal, I'd appreciate hearing from you.
--
Tip is a trademark of the retiring Speaker of the House.
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