Task: 33.6kbps

Ok, clicking on the phone brings up a literal phone, and a post-it with modem noises…

Ok, I'm having audio issues right now, I'll come back to this later.
Solution
Match the sounds with how their written out, in order, The order is:
baaDEEbrrraaahWEWEWwrwrrwrrbeDURRdundittySCHHRRHHRTHRTR
Answering this correctly gives an important clue for later on:

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