Re: CHGLINBSC LINESPEED(????)

[Brian Ellis <bellis@xxxxxxxxxx>]

How does the line know what types of control codes to send to the modem
to have the modem vary it's connection speeds?  Does it have anything to
do with he device setup?

I've tried something similar to what you had said.  I just varied off
the existing line and changed the line description LINESPEED. Then
varied the line back on.  This did not appear to have affected the
modem's connection speeds.

Any suggestions?


Buck Calabro wrote:
>
> >Now all of a sudden I have a requirement to dial out to
> >another system at 9600.  Their modem is setup not
> >to negotiate a rate (it will only connect at 9600).
> >
> >I was hoping to be able to change the line description to 4800
> >or 9600 bps which would send the control codes to my modem
> >and reset it's connection speed respectively.
>
> It's possible, but it depends on the modem.  Let's presume that your modem
> can be set via software.  The way I normally do this is not to change an
> existing line/ctl/dev, but to create a new one on the same I/O resource.
> Vary off LINE4800 and vary on LINE9600.  You can then adjust the new
> settings without fear of breaking the existing ones.  When done with
> LINE9600, vary it off and vary LINE4800 on.
>
> One fairly painless way to do that is to write a little CL program that
> varies off all line/ctl/devd's on a resource and then varies on the one you
> pass in as a parameter.  Call this VARYCL from each of your comms programs
> and you'll be sure that the right description will be varied on.  Next
> month, when somebody says "I need to dial X company at 2400bps" you can add
> a few lines to the CL program and never worry about your existing comms.
>
> Buck
> _______________________________________________
> This is the Midrange Systems Technical Discussion (MIDRANGE-L) mailing list
> To post a message email: MIDRANGE-L@midrange.com
> To subscribe, unsubscribe, or change list options,
> visit: http://lists.midrange.com/cgi-bin/listinfo/midrange-l
> or email: MIDRANGE-L-request@midrange.com