Sending out an S.O.S.

I got off of Skype with a friend and started hearing a squeaking in my earbuds. I didn't know what might be the cause, so I didn't know what I should do. Then I started hearing a pattern to the squeaks. They're pulses. They come in clusters separated by about five seconds of silence and groups separated by about one second of silence. I've read about codes like this before in one of my math classes, but it doesn't make any sense to me.

3-2-2
2-2-3
3-3-2
3-2-2
2-2-2-1
1-2
2-1
1-1-1
1-1-4-1
1-1-1-1-1
This cluster is singled out because it doesn't follow the rule of the numbers adding up to 7, 8, or 9.
5-2-1
3-2-2
2-2-2-1
4-2-2
2-2-2-1
2-2-2-1
2-2-2-1
2-2-2-1
2-3-1-1
3-1-2-1
2-1-2-2
2-2-2-1
3-2-1-1
3-3-2
3-3-2
4-3-1
3-4-1
3-3-2
2-3-3
5-3
3-3-2
2-2-2-1
3-2-2
2-2-2-1
3-2-2
5-3
6-3
2-2-2-1
2-2-2-1
2-2-2-1
2-3-2
3-3-2
3-2-2
3-3-2
3-2-1-1

I lost track of them after this point, but they kept going. A friend of mine suggested I restart to see if it was a hardware glitch. So I did, and they stopped, but only after I completed the login sequence.

If anyone knows what sort of code this was, or what sort of code it resembles, can you give me a shout?