AT&T MERLIN LEGEND Data Manual page 41

Data Communications Hardware
7. Unplug the modem from the wall outlet; then plug it back in. Set switch 1,
bit 2, to the left to store the switch settings in the modem's memory. The
modem is now operating in the AT&T command protocol.
8. Set the options, and save the options into protected memory to prevent loss
of settings in case of a power failure:
Type AT and press Enter to enter the local mode.
Type AT&D2 and press Enter. Option set: drop call when DTR low.
Type AT&C1 and press Enter. Option set: data carrier detect follow call.
Type ATS0=1 and press Enter. Option set: Auto Answer.
Type ATQ1 and press Enter. Option set: disable result codes.
Type AT&W and press Enter to write options to protected memory
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