Habib If V90 also works, transmission will be faster, try Init2 = ATQ0 V1 E1 S0=0 &C1 &D2 +MS=V90 MarvS On Wed, Nov 19, 2008 at 2:07 PM, Habib Seifzadeh <habibseifzadeh@xxxxxxxxx> wrote: > > > First of all, thanks so much guys, especially Marvin and John, > Right now, I'm writing this email from my linux box without any disconnecting :-) > > According to John reply, setting lcp-echo-interval and lcp-echo-failure didn't solve the problem..... > Anyway, thanks again, John. > > Regarding Marvin response, it solved my problem, but the line "Init2 = ATQ0 V1 E1 S0=0 &C1 &D2 +MS=34" should be changed to "Init2 = ATQ0 V1 E1 S0=0 &C1 &D2 +MS=V34" for my modem. > > Sincerely, > Habib Seifzadeh > > > ----- Original Message ---- >> From: Marvin Stodolsky <marvin.stodolsky@xxxxxxxxx> >> To: Habib Seifzadeh <habibseifzadeh@xxxxxxxxx> >> Cc: discuss@xxxxxxxxxxxxx >> Sent: Wednesday, November 19, 2008 2:48:05 AM >> Subject: Re: What's the best init string for noisy lines? >> >> Habib, >> >> At http://linmodems.technion.ac.il, there is a Post Install Howto >> which may be useful. One potential fix is to reduce the default V92 >> compression (+MS=92) which is poorly implemented at some IPs. Try >> first V34 compression with: >> Init2 = ATQ0 V1 E1 S0=0 &C1 &D2 +MS=34 >> >> If that allows your staying on line longer, try V90 with >> Init2 = ATQ0 V1 E1 S0=0 &C1 &D2 +MS=90 >> >> MarvS >> >> On Tue, Nov 18, 2008 at 9:32 AM, Habib Seifzadeh >> wrote: >> > >> > >> > Hi all, >> > >> > Discussing the problem, I have three modems in my home; two of them are based >> on Conexant chipset which work properly by linuxant driver and the other one is >> > Smartlink which works with sl-modem-daemon. So, I don't have any >> > problem with installing the drivers. All of them connect to ISP and >> > transmit info. Also, the OS is Ubuntu 8.10 >> > >> > The problem is that >> > all of them disconnect from ISP frequently (About every 2 or 3 minutes) >> > when I'm in linux but none of them have such problem in Windows XP! I think >> the reason is my noisy phone line but Windows XP knows how to recover from >> noises. >> > >> > I >> > changed some settings like lcp-echo-failure and lcp-echo-interval from >> > /etc/ppp/options file. By increasing value of them, modem doesn't >> > disconnect but no information is transferred 2 or 3 minutes after >> > connecting and therefore I'm forced to disconnect manually. So, they >> > can't solve the main problem.... >> > >> > I >> > guess the issue is solved by changing initial strings in dialing >> > program configuaration files (e.g. /etc/wvdial.conf). After surfing the >> > net, I figured out that thare are some AT Commands in modems for >> > recovering from noise. I think that Windows XP uses these commands so >> > that the modem doesn't disconnect at all. There are some pages which >> > describe AT Commanands but I couldn't find any one which solve the >> > problem cleanly. Does anyone have any information about these AT >> > Commands? >> > >> > By the way, I browsed the .inf file of one of my >> > conexant modem's driver. I found this line: >> > AT&FE0V1S0=0L3&C1&D2+MR=2;+DR=1;+ER=1;W2. When I use this >> > command in wvdial.conf, the modem responds "Ok" but the problem still >> > remains... :-( >> > >> > Any help would be appreciated. >> > Habib Seifzadeh >> > >> > >> > >> > >> > > > > > >
