I am having trouble getting chat and pppd to work properly using the Motorola Bitsurfer TA. The same configuration works fine with an analog modem. I am using kernel 2. The problem seems to be that the dial string is not being sent properly. It sends TD8660091 instead of ATD8660091, which causes a failure. I've tried using AATD8660091 for the dial string. If anyone has gotten a Bitsurfer TA working under Linux, I'd love to know how you got it to work. I wear a lot of hats... I wear a lot of hats - Developer, Database Administrator, Help Desk, etc. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform. I'll bet you have a dial-in getty or equivalent process running on the port, and that program is stealing characters chat would like to see. Make sure nothing is using the port before you start up pppd. Before you even fool around with pppd, it's best to try connecting by hand, using minicom, xc, or some other terminal emulation software. Type the modem setup strings and the ATD string by hand, and make sure the dialing, connecting, and login proceed correctly every time. BTW, I have several BitSurfrs working here. They're nice modems, but a little difficult to get working in Multi-Link mode. I believe it is configured correctly. I am using the auto configuration of rc. It is being recognized on the same IRQ and port as it is under Win95. When I run minicom, it puts the init string on the screen, but when I hit enter so that it can process the string, the cursor doesn't return to the next line and the modem never sends back a response. Can you put a loopback plug on the serial port? Then try minicom again. However, the getty I use mgetty doesn't acquire the line it's monitoring until after it's accepted a connection. Mgetty is pretty good; when it notices that characters are available on the port, it looks for lock files before reading anything. If it can't lock the port itself, it assumes the characters belong to somebody else. Hmmm, you know it's possible that you just have a disagreement about where lockfiles go. Pppd and minicom may be putting them in one place, while whatever's stealing your characters is looking for them somewhere else. Have you ever gotten any other type of modem to work on this port? I have reconfigured the serial ports. I was able to get another modem working on the same port. When pppd starts, it always dies due to an abort from the chat script due to a NO CARRIER message. The ISDN line is definitely connected properly and the ISDN line is working. This has been tested by using an analog modem with the POTS jack on the Bitsurfer. Only the Bitsurfer seems to think their is no carrier. Any ideas about this? Hmmm, this is tougher. If you do the chat script by hand using minicom , do you get connected? If not, there's a chance that your modem is slightly misconfigured for your ISDN system. I'm not an ISDN guru, so this explanation may be slightly flawed, but anyway: apparently, pure ISDN is a 64kbps-per-channel technology, but in many places your ISDN call will get switched through older equipment somewhere along the line. This older equipment operates at 56kbps. My BitSurfr manual says that 64k is the default setting, but I think I also saw an errata note that said the default had been changed to 56k. Dual-link PPP is tough to get going. What equipment does your ISP have on the other end? Are you dialing into another BitSurfr, or into some sort of router? In my case, I have linux boxes on either end, and BitSurfrs between. I use almost the same init string, BUT! Again, have you been able to establish an ISDN connection by hand with minicom? If you can get a single channel, and then see PPP garbage from the other end it looks like 30- or 40-character bursts of line noise, with lots of curly brackets, at about 1-second intervals , you're in good shape. I know that B0 setting mismatches between two BitSurfrs will keep them from connecting. The reference for this is p. Maybe it doesn't matter, but the chat scripts I use say it. It's more than this solution. Get answers and train to solve all your tech problems - anytime, anywhere. Edge Out The Competition for your dream job with proven skills and certifications. Stand Out as the employee with proven skills. Move Your Career Forward with certification training in the latest technologies.
