That's their legacy product.
2nd gen is 256 Kbps
2nd gen was 72kbps, never got to 256. Apple stepped in and got them to write the whole 2nd gen Duplex network off before it got that far.
alt Hacker News
2nd gen was 72kbps, never got to 256. Apple stepped in and got them to write the whole 2nd gen Duplex network off before it got that far.