Sterling Posted January 21, 2014 Report Share Posted January 21, 2014 Hey Folks, I discussed this with support yesterday, but I am still having trouble. I have a Sixnet Land Line modem connected to a V350. The V350 has a RS232 expansion port. On the other end I have a US Robotics USB modem connected to a PC running Visilogic and Remote Access. The PC dials and the modems connect. However, I can't go online. I am concerned about the flow control on the USB modem. Do you have anyone with experience with USB modems? Take Care Richard Quote Link to comment Share on other sites More sharing options...
MVP 2023 Joe Tauser Posted January 25, 2014 MVP 2023 Report Share Posted January 25, 2014 The US Robotics modem may be adding error correction characters you don't know about that are causing the Sixnet modem to choke. You'll need to chase down the AT command set reference for you modem and issue a command to turn off error correction. There is a reason why I know this. Has this setup ever worked? Joe T. Quote Link to comment Share on other sites More sharing options...
MVP 2014 Simon Posted January 27, 2014 MVP 2014 Report Share Posted January 27, 2014 It's a while since we set up a landline link. If you can figure out the details, such as Joe posted, then it is good to have that knowledge. We always followed the less subtle method of only using two identical modems, which makes it simple. Quote Link to comment Share on other sites More sharing options...
Sterling Posted January 29, 2014 Author Report Share Posted January 29, 2014 Hey Folks, Thanks for the response. No this has never worked. My customer did not want to purchase a second Sixnet modem, because his customer wants to us a laptop computer for remote monitoring. The US Robotics USB modem is a V.92. I think Joe is correct, the problem is the error correction and data compression. I tried to turn on V.44 data compression and error correction, with no luck. Sixnet has a V.92 modem "VT-Modem-5" I am thinking about trying one. Modems are always a pain. Take Care Richard Quote Link to comment Share on other sites More sharing options...
MVP 2023 Joe Tauser Posted January 31, 2014 MVP 2023 Report Share Posted January 31, 2014 Turn all data compression and error checking off. Unitronics doesn't like it. Joe T. Quote Link to comment Share on other sites More sharing options...
Sterling Posted February 13, 2014 Author Report Share Posted February 13, 2014 Hey Folks, Thanks for all of the comments. I gave up on the Sixnet VT-Modem-1. We purchased a Sixnet VT-Modem-5 with V.92 compression and it works. Take Care Richard Quote Link to comment Share on other sites More sharing options...
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