Where To Find The Nokia Ca-42 Cable?. in Nokia Posted August 31, 2005 · Report reply This is a new one. Just checked the Nokia site. While it lists both 3120 and 3125 with the CA42 it only lists the 3120 with the DKU5. So does it make DKU5+3125 a no-no as far as Nokia are concerned. Glad to know that a CA42 clone is available. eBay sitll has none on ots site! I suspect that Nokia have brought in the CA42 to try and quench the clone market. I have no experience with the CA42 so my comments have to be of a general nature. I was able to install PCSuite 6.6 (overwriting the 6.50 with no hassle. (I had had a minor hassle in installing 6.5 in that while everything worked fine with the GSM suite, I was unable to get things going with the CDMA suite. As both 3120 and 3125 were working, I did not follow it further. May be the clue lies here itself. You have to somehow stop the Nokia CA42 driver frme messing you up. Some ideas: 1. Look in the connection manager of the PCSuite. Kill the connection to the CA42. If this is on then the CA42 (Nokia and hence not operational) grabs the line and stops all connectivity. After killing the CA42 connection wait for a minute or so and then reconnect the cable and phone and see if you have some joy on RConnect. If yes, then go into the suite and find where the 'Cheetah' connection is. It can be in the serial /DKU5 set. Switch this on and you should be GO! 2. Check in your Device Manager. If there is a Nokia CA42 driver listed then getting rid of it, may help. 3. A long shot here. What you have to do is install the DKU5_2 from the old set. I am assuming that the CA42 driver you have is notning more than a replacement of the DKU5_1 driver. One must bear in mind that whether one is using the CA42 or the DKU-5 the phone on serial has to connect to the USB port of the computer, so a protocol conversion is necessary. Hope these idea help.