Scott, Here's a highly filtered version that MAYBE a TNC or a sound-card packet program could be fed with the copy the packet.
It's very obviously standard Bell 202 packet tones once you high and low pass filter the crud out of it, and take out the offending DTMF as much as possible. http://www.natetech.com/files/Signal_3-filtered.wav I left the clicks in (zero-crossings from the DTMF generator sending the zeros) as I'm not a packet expert and couldn't tell you if chopping those out in the middle of the packet waveform would screw up the timing or blow away the CRC of the packet. In fact, it sounds like the end of the packet might be chopped off, so you might need to put whatever's copying it into a "ignore CRC error correction" mode and just go for the raw stuff and see if you can make anything out of it. Nate WY0X p.s. I used a free program called Audacity and some free filters found on the Net to hack on the original WAV file you sent. I may have over-done it a bit here, but man is that packet audio weak in that original file! I amplified this quite a bit, which added noise, and then low-pass filtered off the high end to get rid of the hiss. I also chopped the white noise off the front and back.
