It's a string of Hayes modem control codes.
AT - attention
H0 - pick up the phone, ending any previous call from the same modem
M0 - silence the modem speaker
V1 - set the modem to verbose mode, displaying English-language information instead of number codes
D - dial the following number
T - use touch-tone dialing instead of pulse dialing
8675309 - call JENNY-BBS
@noelle i.... i thought it said "at homo vid"
@noelle isn't H0 hanging up and H1 is picking up? H0 is fine though (ending any calls if exist)
@FiLiS whoops, you're right - I got it backwards.
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