ISP Information:
A mobile phone 2.5G technology that allows short bursts of data between a phone and a network such as the Internet. The short transmissions allow for less costly connectivity than a constant connection, but work best with specialized services designed for such types of communication.
ISP Glossary:
General Packet Radio Service - "Ed" wrote in messagenews:6i5umvkgi8amaq2ftpr8fc1bvi3e1eocoj@4ax.com... On Mon, 22 Sep 2003 13:23:48 GMT, "Hooda Gest" wrote:You had 7 retrains, this is not good. And your disconnect was due to afailure to establish a working configuration during a retrain.Look at your Speed... it dropped from the peak of 54666 to a miserable32000.It would be nice to see an ati11. That would show the number ofspeedshiftsand a bit more info.But I would try a little speed limiting after I checked some otherthings.Among the things to check is your wiring behind the computer/modem. Moveyour line cable away from your electrical cords as mch as possible. Also,remove any and all devices from the line the modem uses, if any. If thatdoesn't improve things, try using the speed limiting commands. Start bylimiting the max speed to, say, 52000 and work downward until you see noretrains in the post-call diagnostics. USe &u6&n35 for the USR modem.Thatwill give you an operating range of 9600bps (&u6) to 52000 (&n35). Youmustuse both commands for the speed limiting to work.Retrains are not caused by OS oddities but by line problems.Interruptionsof carrier will trigger one, as will excessive speedshifts. Speedshiftsarethe modem's attempts to adjust to line conditions. Added the string which you suggested and after I got knocked off I did the ati11; here are the results U.S. Robotics 56K FAX EXT Link Diagnostics... Modulation x2/V.34 Carrier Freq (Hz) None/1920 Symbol Rate 8000/3200 Trellis Code None/64S-4D Nonlinear Encoding None/ON Precoding None/ON Shaping ON/ON Preemphasis (-dB) 9/4 Recv/Xmit Level (-dBm) 19.0/17.0 Near Echo Loss (dB) 39.7 Far Echo Loss (dB) 0 Carrier Offset (Hz) 0 Round Trip Delay (msec) 18 Timing Offset (ppm) 9252 SNR (dB) 54.6 Speed Shifts Up/Down/Null 8/11 Status : ua,5,12N,12.1,-15,0Y,000,50.3,-67.8,0 The phoneline is dedicated for the modem and nothing else is connected. The phone line is as faar away as practile.See the speedshifts? Way too many. I can't tell if the modem took to thecommands you added because you didn't also include the ati6. I guess Ishould have suggested you use ati6i11 instead of just asking for the ati11.In te above, did the modem connect at 52000 as the command would have it do?From what I can tell, the modem "sees" a very good line when it firstconnects (hence the 54666 connect) but the conditions do not hold up welland the modem spends a lot of time trying to maintain too high a speed forconditions. This results in poor throughput, excessive retrains, and thoseunexpected disconnects. The question in my mind is what is causing thisgreat disparity between the connect speed and what the line can actuallyhandle. I think it may be time to examine your wiring and determine if thetrouble is in (house wiring) or out (telco wiring). One method is to locatethe telco's interface box. Inside that box is a test jack. If there are twotest jacks, one will go for your main line and the other will be that modemline. If there is only one, your primary line will be the center pair andthe secondary line will use the outside pair and you will have to rig aphone cable to access the one you wish to test. Unplugging the line fromthat jack and plugging a good phone extension cord into it and running itdirectly to the modem will eliminate all inhouse wiring. If the modemconnects at the usual high speed and functions well, with no retrains andfew errors, the problem is somewhere in the house wiring. A re-wire from theinterface box to the modem will bypass that house wiring and you should beall set. If it does not correct the problem, you have a telco problem andthese are difficult to clear because the telcos are not required to provideyou with anything but a voice quality line, not a perfect data quality line.I have to think there's something happ
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