We were having a performance problem with Sun’s javax.comm implementation. We purchased your product, and got it running with our app using the javax.comm API without any changes to our code. After doing so, we even found a buffer length problem that was not being caught by Sun’s comm implementation (This had nothing to do with our performance problem). Apart from this, the performance is now excellent – certainly more like what I would have expected! Our application can continually stream data at 115kb in both directions simultaneously with full error detection and correction.