Kevin Traas writes: > > I have a Motorola Bitsurfr Pro (external). It works fine under Linux; > > it looks like a modem. (It has a zillion AT commands.) > > Thanks for the info. Just a couple of questions.... <grin> > > What type of serial port do you have? 16550? How fast are you running the > serial connection? Higher than 115,200bps? Do you connect at 64K or 128K > or either? > (Apologies if I should have replied privately rather than following up. I'm not sure if anyone else on this list is interested...)
Until recently I just used the built-in serial ports, which are 16650a limited to 115000 bps. I have recently bought a Byte Runner card and am talking to the Bitsurfr at 230400 bps. Have I noticed a big difference? No. I've started trying some tests, and will switch back to 115000 and see if it I can measure any difference. There are typically delays at so many points its hard to get consistent results. Subjectively (very!) 2 channels are faster than 1, but not twice as fast. When I connect to work I always use 2 channels (if I can, sometimes it only connects with 1; I'm not sure why). Since when connecting to my ISP I have to pay per-channel per-time I often connect with just 1 channel. Since I have a static address and ISDN connect time is quite fast compared with an analog I can disconnect and reconnect differently (e.g. to download a large file I might switch to 2-channel operation). My connect file sees if a specific file exists, and based on that connects with 1 or 2 channels. >From what I have read, an ISDN router is a much nicer route to go, but costs more; at least 50% more and up (way up). The Linux Journal usually has an ad for an internal ISDN board with drivers for Linux; Spellcaster - http://spellcast.com . > Canada probably has a National ISDN protocol of it's own.... No, I don't think so. I live in Canada and my Bitsurfr is working! Actually, there is one model of Bitsurfr for Canada/US, and another for elsewhere (or is it just Europe? I'm not sure). > One thing I'm interested in is configuring things so that I can > establish a 1 or 2 B channel connection on demand. My ISP supports > Multilink PPP; therefore, I'd like to set things up so that if I > know I'm going to be needing all the bandwidth I can get, I'll > establish the connection using the two B channels. I think many routers can change 1 or 2 operations on the fly, but I'm not sure. An ISDN-card might let you (especially if you had the source to the driver!!!). > (It would be great if the Linux box could be set to timeout after a > period of bandwidth "saturation", drop the single B channel > connection, and then reconnect using both B channels....) You might be able to hack diald to do this. However, if your ISP assigns you a dynamic IP address you might run into problems. With a static IP address you can drop the connection and call back (within a limited time) and still talk to the telnet or ftp session. With a dynamic address the other end would think you were a different person and so you'd lose your connection. I think. Richard. -- TO UNSUBSCRIBE FROM THIS MAILING LIST: e-mail the word "unsubscribe" to [EMAIL PROTECTED] . Trouble? e-mail to [EMAIL PROTECTED] .