mp@whuxle.UUCP (Mark Plotnick) (05/16/84)
There was discussion awhile ago in one of the net.news subgroups about getting 2400-baud modems, but people said they were kind of expensive. Well, in last week's Computerworld, there was an article about a product from Chung Telecommunications Corp. in Palo Alto. They have a device called the Turbo-Max-2 that goes for $995. It allegedly "compacts and combines two full-duplex 2400 bit/sec asynch data streams into a 1200 bit/sec modem." Ms. Chung claims it is "impervious to data content, protocol and line conditions." Has anyone heard anything more about this, or seen it in action? Mark
dya@unc-c.UUCP (05/17/84)
References: whuxle.367
It's not a product. It's not a product. It's not a product!
I've been bugging these people for several months ( in fact, it is
time to bug them again ) because they supposedly can compact 19.2 kb/s
async into 9.6 kb/s async ( want to use with my 9600 A/B UDS modems ).
Yes, I know that Ms. Chung keeps claiming that the compression is 2:1
regardless of data content, but I don't believe it...yet.
Another product, the Racal-Vadic Scotsman III, uses about 4 different
algorithms based on the statistical occurance of each ascii character
coming in (kinda like a dynamic Huffman code). It is totally worthless
unless you are sending plain English text. One of its modes actually encodes
frequently used words.
When they have a product, I'll post to the net a full road test with
really scrambled data ( delta-modulated 256kb TV pictures. )
dya