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Modem Strings [was: Tech Time 8: Modem Contact]

croxiscroxis I am the walrus
So I have an extrernal serial 56k modem that only connects at 28.8 with the usual ATZ init string. Now Biggles says that the modem was connecting slow because it isn't configured right. So with the string AT&F&H2&I2&B1&K1&M4 I now have a 33.3 ish connection. Alas I am stumped. So I am asking all of my wonderful friends here at firstones for their help :)

(extra info: modem is a US Robotics Sportster Voice 00178400)

Danka!

Comments

  • BigglesBiggles <font color=#AAFFAA>The Man Without a Face</font>
    More info: the winmodem connects at 56k fine.
  • croxiscroxis I am the walrus
    ahh yah i knew i forgot something
  • JackNJackN <font color=#99FF99>Lightwave Alien</font>
    Could be the serial port you are connecting the external modem to is not working through a 16550 UART, or that the port speed is set to low for higher connections to work.


    'bout all I can think of at the moment

    ;)
  • E.TE.T Quote-o-matic
    Speed depends also greatly on phone line, if it "rusted barbwire"... well, I guess you got the point.
  • The Cabl3 GuyThe Cabl3 Guy Elite Ranger
    Just get broadband :D.
  • TyvarTyvar Next best thing to a St. Bernard
    The phone lines your using croxis are probably the rusted barbwire that was mentioned earlier. I know thats what they are like outside of Oregon City.

    And as for the broadband suggestion...

    Croxis may be fortunate enough to live in an area that can reiceve broadband, but there are more then a few places outside of portland that cannot get any form of broadband at all, because they are not served by cable, and the phone lines can not handle DSL.
  • Random ChaosRandom Chaos Actually Carefully-selected Order in disguise
    Then just get a T3 ;)

    -------------

    Speaking of modem problems, my winmodem drops the connection on uploads (FTP) after uploading between 500k and 1MB. Any ideas?

    Note: the other computer in the house has no problem with uploads on its modem.
  • TyvarTyvar Next best thing to a St. Bernard
    That means paying an additional fortune for them to lay all new cable to support the T3... literaly the infrastructure in the rural areas can not support broadband.
  • BigglesBiggles <font color=#AAFFAA>The Man Without a Face</font>
    [QUOTE][i]Originally posted by E.T [/i]
    [B]Speed depends also greatly on phone line, if it "rusted barbwire"... well, I guess you got the point. [/B][/QUOTE]

    As mentioned, the winmodem connects fine at 56k, so the line itself is not likely to be the problem.
  • croxiscroxis I am the walrus
    yes I thought it was line problems at first, but our house is almost brand new and like it was mentioned our win modem goes full speeds. Now if I could just get the win modem reconized in linux.....
  • E.TE.T Quote-o-matic
    Hmm, might be something to do with modem's settings.

    Do you have modem's manual which would explain AT commands and registries used by settings?

    One of my modems had too short dial tone waiting time as default so it required adding one command to dial command. Then I read manual and found AT command which saved longer dial tone waiting time to registry as default setting.
  • BigglesBiggles <font color=#AAFFAA>The Man Without a Face</font>
    [QUOTE][i]Originally posted by croxis [/i]
    [B]yes I thought it was line problems at first, but our house is almost brand new and like it was mentioned our win modem goes full speeds. Now if I could just get the win modem reconized in linux..... [/B][/QUOTE]

    Have you tried [url=http://linmodems.org/]Linmodems[/url]?
  • JackNJackN <font color=#99FF99>Lightwave Alien</font>
    Several newer distro's of Linux support WinModems via a linux driver designed to find em
    ...

    I think it's either the AT settings or its your serial port connection...

    ;)
  • Vertigo1Vertigo1 Official Fuzzy Dice of FirstOnes.com
    Jack, unless his computer is a dinosaur, I think it can handle 16550 UART.
  • croxiscroxis I am the walrus
    ok time ot attack this:

    I haven't managed to download the manual yet so I know of no specific details.

    There is no native winmodem support (i'm using freesco)

    I don't have gunzip to use linmodem (working on trying to get that)

    And the computer is 9-10 years old, I don't know if that would be too old tho.
  • JackNJackN <font color=#99FF99>Lightwave Alien</font>
    [QUOTE][i]Originally posted by croxis [/i]
    [B]ok time ot attack this:

    I haven't managed to download the manual yet so I know of no specific details.

    There is no native winmodem support (i'm using freesco)

    I don't have gunzip to use linmodem (working on trying to get that)

    And the computer is 9-10 years old, I don't know if that would be too old tho. [/B][/QUOTE]

    Is it a 486, Pentium ???

    Are the serial port(s) built in or on a PC expansion card?

    Not all Serial cards used 16550 UART chips, and if this is the case, you'll have to get a newer serial port of some kind.

    9-10 years old is on the border line of when both types were being used (1994-95). And for the newer modems you had to get one with the 16550.

    Your winmodem has it built in, so that's why it is not an issue with that one. ;)
  • JackNJackN <font color=#99FF99>Lightwave Alien</font>
    [QUOTE][i]Originally posted by Vertigo1 [/i]
    [B]Jack, unless his computer is a dinosaur, I think it can handle 16550 UART. [/B][/QUOTE]

    Well... I guess we'll find out... :p
  • Random ChaosRandom Chaos Actually Carefully-selected Order in disguise
    You should be able to check/set your serial port speed in the bios...
  • E.TE.T Quote-o-matic
    Little info about UARTs:
    [url]http://www.aplawrence.com/SCOFAQ/FAQ_scotec5uart.html[/url]
    [url]http://byterunner.com/why.html[/url]
  • BigglesBiggles <font color=#AAFFAA>The Man Without a Face</font>
    I agree with Jack. A computer that old is borderline for having a fast enough UART.
  • croxiscroxis I am the walrus
    Great, make me drag my monitor downstairs =Þ

    However, it doesn't explain why its running slow on newer systems like mine.. Someone on nother forum suggested that its damage to the 'front end' of the modem and should be fixable with some electronic experiance ;)

    Yes I am two timing you guys!
  • BigglesBiggles <font color=#AAFFAA>The Man Without a Face</font>
    OK, if it does the same thing on newer computers it isn't a UART problem.
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