where is modem connection speed?

where is modem connection speed?

Post by Robert W Curre » Sat, 13 Dec 1997 04:00:00



How the heck do I find out what speed my modem connected at, when I look
at messages I see:

Nov 30 01:11:46 bohr ifup-ppp: pppd started for ppp0 on /dev/modem at 115200

And I know I am not connecting at 115200 with my 14.4 baud modem.  So,
where can I see what I am actually connecting at?

--
"Complete Idiots Guide to Running LINUX Unleashed in a Nutshell for Dumbies"
  What a book!
Robert Wesley Current Jr.
http://www.ted.org/~badlands/

University of North Dakota         _/ | _
Department of Chemistry           /'  `'/
Office Phone (701)777-2541      <~    .'
ACS, AAAS, NDAS                 .'    |
                              _/      |
                            _/      `.`.
                    _______/ '   \__ | |______
##################_/ (|___/      /__\ \ \     \___.#######################
#################/    \___.'\_______)\_|_|        \#######################
################|\                                 -----\#################
################| \____________________________________/|#################
###############/   |                                    |#################

 
 
 

where is modem connection speed?

Post by Colonel Pani » Sat, 13 Dec 1997 04:00:00


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Quote:> How the heck do I find out what speed my modem connected at, when I look
> at messages I see:
> Nov 30 01:11:46 bohr ifup-ppp: pppd started for ppp0 on /dev/modem at 115200
> And I know I am not connecting at 115200 with my 14.4 baud modem.  So,
> where can I see what I am actually connecting at?

Well, this would be reported through the modem when it's actually
connecting, since it is a "message" returned by the remote, e.g.,
CONNECT 14400.  The types of messages returned is set in your modem
init string ... should be in your modem manual.

I believe, however, that some modems will falsely return whatever
value you have your port set to, as you note above.  The only way
around this is to set "speed" to "auto," if possible.  (My old telebit
returns both serial port speed and actual connect speed -- how's that
for confusion?)

mp

 +=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=+=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=+
 | Linux 2.0.32 -> AMD 5x86-133  | pgpk -a finger://teleport.com/looie |
 +=-=-=-=-=+=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=+

 +=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=+

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where is modem connection speed?

Post by Kent Robott » Sat, 13 Dec 1997 04:00:00



f> How the heck do I find out what speed my modem connected at, when I look

> at messages I see:
> Nov 30 01:11:46 bohr ifup-ppp: pppd started for ppp0 on /dev/modem at 115200
> And I know I am not connecting at 115200 with my 14.4 baud modem.  So,
> where can I see what I am actually connecting at?
> --
> "Complete Idiots Guide to Running LINUX Unleashed in a Nutshell for Dumbies"
>   What a book!
> Robert Wesley Current Jr.
> http://www.ted.org/~badlands/

> University of North Dakota         _/ | _
> Department of Chemistry           /'  `'/
> Office Phone (701)777-2541      <~    .'
> ACS, AAAS, NDAS                 .'    |
>                               _/      |
>                             _/      `.`.
>                     _______/ '   \__ | |______
> ##################_/ (|___/      /__\ \ \     \___.#######################
> #################/    \___.'\_______)\_|_|        \#######################
> ################|\                                 -----\#################
> ################| \____________________________________/|#################
> ###############/   |                                    |#################

Try adding W1 or W2 to the modem init string.

AT&FW1

Look in the /var/log/messages and or debug files for the output
from pppd and chat.

If you have a 14.4 modem you should have 19200 for modem speed, not
115200.

--
ftp://wauug.erols.com/pub/people/kent-robotti/doslinux/index.html
ftp://wauug.erols.com/pub/people/kent-robotti

PPPsetup is a bash shell script for creating a chat script
to make a ppp connection.

pppsetup-1.66.tar.gz

 
 
 

where is modem connection speed?

Post by Duncan Simps » Sat, 13 Dec 1997 04:00:00



Quote:>How the heck do I find out what speed my modem connected at, when I look
>at messages I see:
>Nov 30 01:11:46 bohr ifup-ppp: pppd started for ppp0 on /dev/modem at 115200
>And I know I am not connecting at 115200 with my 14.4 baud modem.  So,
>where can I see what I am actually connecting at?

The modem tells you by a number or connect message. The sane way to
set things up is a high speed, fixed baud connection to the modem
(115200 looks like a good number for 16550+ serial ports, which you
probably anyway these days) and let the modem handle the rest. If only
my 28.8k modem connected at 115200 baud oer the phone line my
telephone bills would go down by a lot! (The charges are per second
and there are not free calls... and my bank balance is already <nil
after paying rent and food).

Duncan (-:

 
 
 

where is modem connection speed?

Post by Steve Tup » Mon, 15 Dec 1997 04:00:00



> probably anyway these days) and let the modem handle the rest. If only
> my 28.8k modem connected at 115200 baud oer the phone line my
> telephone bills would go down by a lot! (The charges are per second

        Huh? 115200 is only the DTC rate, not the DTE rate. IOW, the speed
between the modem and your own computer is set at 115200, NOT MODEM TO
MODEM, the modem is still at 28.8

You will not get faster speeds with a higher DTC rate, only faster DTC
rate, which may prove to improve performance in the range of .5-2% ,
tops!

Sorry to break the bad news to you... :)

Snag a 56K flex modem. I use them on my modem banks on my Livingston
PM3's for my customers and they work great... appr 6-7.5K/Second
throughput depending on the client modem. Worth having a look at.

Regards,

  vcard.vcf
< 1K Download
 
 
 

where is modem connection speed?

Post by Bob Taylo » Tue, 16 Dec 1997 04:00:00




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> Hash: SHA1


>> How the heck do I find out what speed my modem connected at, when I look
>> at messages I see:

>> Nov 30 01:11:46 bohr ifup-ppp: pppd started for ppp0 on /dev/modem at 115200

>> And I know I am not connecting at 115200 with my 14.4 baud modem.  So,
>> where can I see what I am actually connecting at?

> Well, this would be reported through the modem when it's actually
> connecting, since it is a "message" returned by the remote, e.g.,
> CONNECT 14400.  The types of messages returned is set in your modem
> init string ... should be in your modem manual.

> I believe, however, that some modems will falsely return whatever
> value you have your port set to, as you note above.  The only way
> around this is to set "speed" to "auto," if possible.  (My old telebit
> returns both serial port speed and actual connect speed -- how's that
> for confusion?)

My interal modem reports CONNECT 115200. I ran chat -v and noticed that
the actual CONNECT speed was CARRIER <speed>. I then put
REPORT CARRIER in my chat script. Problem solved.

--
+---------------------------------------------------------------+

|---------------------------------------------------------------|
| Like the ad says, at 300 dpi you can tell she's wearing a     |
| swimsuit. At 600 dpi you can tell it's wet. At 1200 dpi you   |
| can tell it's painted on. I suppose at 2400 dpi you can tell  |
| if the paint is giving her a rash. (So says Joshua R. Poulson)|
+---------------------------------------------------------------+

 
 
 

1. Querying modem-to-modem speed of PPP connection.

I'm using Redhat 4.1.

Is there a way to query the modem-to-modem speed of an existing PPP
connection?  I know that I can send packets and do timings to
calculate this, but I'm wondering if there is some utility that already
exists which will give me this information.

By the way, I'm not interested in the speed returned by 'setserial',
since that's the speed of the port itself, not the modem-to-modem
speed.

Thanks in advance.

--
 Lloyd Zusman

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