On Fri, Apr 09, 1999 at 09:27:40AM +0200, Ookhoi wrote: > > > > Is there a way to measure the actual speed at which a modem is > > > connected? As modems negotiate the speed al the time, the CONNECT string > > > at the start of the connection is not up to date some time later. > > > > Depending on your modem model, there's probably an AT command which will > > give this information. For my USR Courier, it's ATI6. My older modem was a > > Cardinal internal which IIRC used a Rockwell chipset, and used the command > > AT&V1. > > Thanx! I have an internal Dynalink and an external E-tech, both 56k. Do > you have any advice for me how to tune them so that they communicate as > fast as possible? Most likely I have to replace the Dynalink with an > identical E-tech, but then? What mru and mtu should I try? And what mnp > block size? There are three exchanges between the modems.
I haven't spent much time messing around with these parameters, maybe a dejanews search would yield some relevent info. IIRC, you can't get a 56K connection unless one of the modems is directly connected to a digital phone line (i.e. on an ISP's rack), so if you are getting 33.6 that may be as good as it gets. > > > If I reset the Courier (ATZ), it will forget the speed. To get around this > > you can either use cu from the uucp package, or modify the modem init string > > in minicom from ATZ to ATI6Z. > > Maybe a stupid question, but how can I send the command to the modem? I > connect with the pppd and a chat script. After that minicom -o doesn't > let me in: "Device /dev/ttyS3 is locked." [...] That's why installed uucp, because cu doesn't do this. Later, I figured out that if you go into the "Modem and Dialing Parameter Setup" screen I could add the info command (I6) ahead of the Reset command (Z) I would get my info once as minicom sets up. -- Dave Thayer Denver, Colorado USA [EMAIL PROTECTED] [EMAIL PROTECTED]
