Re: Forcing modem connection to 57600 bps
On Sunday 21 January 2001 12:37, Rino Mardo wrote: > Hi. Since the subject is about 56K modems, I'm just wondering how > would one measure the online speed (as opposed to the connect speed)? Have a look at bing. -- Bud Rogers <[EMAIL PROTECTED]> http://www.sirinet.net/~budr/zamm.html All things in moderation. And not too much moderation either.
Re: Forcing modem connection to 57600 bps
On Sat, Jan 20, 2001 at 11:27:45PM + or thereabouts, John Carline wrote: > > > > I have the same modem, and was told the the following would give me 56K mode > > ATZ > AT&F0 L3 W2 > AT+MS=12,1,300,56000,0,0,33600 > > > However, since my phone lines are so crummy I have no idea wether or not the > settings work. My > connections usually range from 14.4 to 28.8 no matter what modem or setting I > try. (Gawd I'll be glad > when I can get DSL). > > I'd like to know if the settings actually work above 33.6, so if you try > them I'd appreciate knowing > the result. :-) Hi. Since the subject is about 56K modems, I'm just wondering how would one measure the online speed (as opposed to the connect speed)? -- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+--+-+-+-+-+-+ Key fingerprint = 9DE1 5825 77B4 FF45 7485 D3EB DCCF DE48 09B6 4426 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+--+-+-+-+-+-+ Who's watching the watchmen? pgpQ4ViN817iZ.pgp Description: PGP signature
Re: Forcing modem connection to 57600 bps
Jarkko Niemi wrote: > After using my dial-up connecton with speed reporting I wanted to force > my modem up to it's maximum speed. It works from windows side, so, it's > just up to configuring it also to Linux. Windows doesn't help, there is > just one box where to check as "[] use always this speed", no AT > commands found there (was that really a suprise?). > > By the way it's internal ISA modem named > SupraExpress 56i SP Intl > > So, I went to look modem's AT manual and edited /etc/chatscripts/ > I added AT+MS= part just before number dialing. > I don't know do I use wrong AT command, or are parameters wrong, > anyway it calls, but not connect. > By commenting that out, everything works like earlier - giving usually > 48000 or 46667 connects. > > Any ideas where to look next? > I have the same modem, and was told the the following would give me 56K mode ATZ AT&F0 L3 W2 AT+MS=12,1,300,56000,0,0,33600 However, since my phone lines are so crummy I have no idea wether or not the settings work. My connections usually range from 14.4 to 28.8 no matter what modem or setting I try. (Gawd I'll be glad when I can get DSL). I'd like to know if the settings actually work above 33.6, so if you try them I'd appreciate knowing the result. :-) John -- Powered by the Penguin
Re: Forcing modem connection to 57600 bps
To quote Jarkko Niemi <[EMAIL PROTECTED]>, # So, I went to look modem's AT manual and edited /etc/chatscripts/ # I added AT+MS= part just before number dialing. # I don't know do I use wrong AT command, or are parameters wrong, # anyway it calls, but not connect. # By commenting that out, everything works like earlier - giving usually # 48000 or 46667 connects. 48000 and 46667 are just about par in many areas. The speed of a connection is negotiated between the two modems, and depends on line conditions. I live in a fairly old neighbourhood, and unless you've got a very good modem, you'll only get those speeds here. I spent some extra money quite a while ago and got a high-quality modem(although part of it was luck), and I can usually connect at somewhere around 54000. But what you're getting seems to be normal. If you were down in the 33.6k or 28.8k area, I'd worry that maybe something isn't set up rigt, but since you're getting such high speeds(compared to the alternatives ;), I wouldn't worry. Maybe you could bitch to the phone company about bad lines, but that's just about it. David Barclay Harris, Clan Barclay Aut agere, aut mori. (Either action, or death.)
Re: Forcing modem connection to 57600 bps
Quoting Jarkko Niemi ([EMAIL PROTECTED]): > After using my dial-up connecton with speed reporting I wanted to force > my modem up to it's maximum speed. I think the quick answer to this is: you can't. The modems at each end of the line negotiate the speed themselves. All you can do is decide whether to accept their negotiated value, and abort if you don't approve. > By the way it's internal ISA modem named > SupraExpress 56i SP Intl > > So, I went to look modem's AT manual and edited /etc/chatscripts/ > I added AT+MS= part just before number dialing. > I don't know do I use wrong AT command, or are parameters wrong, > anyway it calls, but not connect. No idea. You've got the modem manual. I assume you're setting what would be set with &N and &U (ceiling and floor connection speeds) on my modem (USR). > By commenting that out, everything works like earlier - giving usually > 48000 or 46667 connects. Good. Leave it out, unless you want to try later if you get an awful speed. Those speeds look good. > # forcing modem speed to maximum (jin) > OK AT+MS=,0,56000,56000,,, How can you expect 56K, the *theoretical* maximum. Cheers, -- Email: [EMAIL PROTECTED] Tel: +44 1908 653 739 Fax: +44 1908 655 151 Snail: David Wright, Earth Science Dept., Milton Keynes, England, MK7 6AA Disclaimer: These addresses are only for reaching me, and do not signify official stationery. Views expressed here are either my own or plagiarised.
Re: Forcing modem connection to 57600 bps
Its likely that windows is actually reporting the speed to the UART chip on the modem and not the actual connect speed (i've it do this to me before) which would be 57600 for a 56k modem. Trying to force your modem to a higher speed is probably not a good idea. I see you are .fi so the US FCC limit to 53kbps shouldnt apply to you, and i dont know how valid my next statements will be, but analog lines are generally noisy, and your modem talks with the remote side to negotiate the fastest speed the can talk to eachother over the lines and still understand eachother. By forcing your modem to go faster, you need to get the remote side to go faster as well, and likely your line cant handle a faster speed without corruption to the bitstream, so in eaiter case you are likely to get bad data if you force the connection to go faster. I've seen lines so bad 56k modems connect a 26k, and the highest ive seen is 50k, and that was only once. -Casey On Tue, 16 Jan 2001, Jarkko Niemi wrote: > After using my dial-up connecton with speed reporting I wanted to force > my modem up to it's maximum speed. It works from windows side, so, it's > just up to configuring it also to Linux. Windows doesn't help, there is > just one box where to check as "[] use always this speed", no AT > commands found there (was that really a suprise?). > > By the way it's internal ISA modem named > SupraExpress 56i SP Intl > > So, I went to look modem's AT manual and edited /etc/chatscripts/ > I added AT+MS= part just before number dialing. > I don't know do I use wrong AT command, or are parameters wrong, > anyway it calls, but not connect. > By commenting that out, everything works like earlier - giving usually > 48000 or 46667 connects. > > Any ideas where to look next? > > /etc/chatscript/
Re: Forcing modem connection to 57600 bps
At Tue, 16 Jan 2001 14:26:22 +0200 , Jarkko Niemi <[EMAIL PROTECTED]> wrote: >After using my dial-up connecton with speed reporting I wanted to force >my modem up to it's maximum speed. It works from windows side, so, it's >just up to configuring it also to Linux. Windows doesn't help, there is >just one box where to check as "[] use always this speed" I suspect that that little box is just the speed between your PC & the modem, not the modem connection speed to your ISP (which will vary according to line quality, for example). I have never seen a modem connect at anything over about 52k. >By the way it's internal ISA modem named > SupraExpress 56i SP Intl > >So, I went to look modem's AT manual and edited /etc/chatscripts/ >I added AT+MS= part just before number dialing. >I don't know do I use wrong AT command, or are parameters wrong, >anyway it calls, but not connect. You've told it not to, I expect :-) What it does is try to connect at the speed you specify (57600 in your case), can't and so aborts the connection. This can be quite useful if you set it at, say, 42000 (or whatever minimum speed you consider acceptable), because it can save you time/money, but if you pay a minimum charge per call then it might be wasteful (depends on your usage pattern - for example if you tend to blink on, collect a few emails, and then disconnect its not worth it, but if you tend to go online for long periods and max out the line then you will prefer to have the higher speed because it is more cost effective). The speeds you quote are quite acceptable for a modem, nothing unusual at all. Bottom line is, you can't force the modem to get more data than prevailing conditions allow; get a digital connection (if you can, I know such are not always available, depending on circumstances) :-) Get your own FREE E-mail address at http://www.linuxfreemail.com Linux FREE Mail is 100% FREE, 100% Linux, and 100% yours!
Forcing modem connection to 57600 bps
After using my dial-up connecton with speed reporting I wanted to force my modem up to it's maximum speed. It works from windows side, so, it's just up to configuring it also to Linux. Windows doesn't help, there is just one box where to check as "[] use always this speed", no AT commands found there (was that really a suprise?). By the way it's internal ISA modem named SupraExpress 56i SP Intl So, I went to look modem's AT manual and edited /etc/chatscripts/ I added AT+MS= part just before number dialing. I don't know do I use wrong AT command, or are parameters wrong, anyway it calls, but not connect. By commenting that out, everything works like earlier - giving usually 48000 or 46667 connects. Any ideas where to look next? /etc/chatscript/
