Re: CHGLINBSC LINESPEED(????)

[ken shields <kjs@xxxxxxxxxxx>]

Brian
        I use several older modems, the difference being their maxed at 4800
baud.(Racal models)
        Most modems have a setting that will adjust the baud rate,according to
the incoming rate.
        Check the modem manual for this function, and I'm pretty certain
it will work.
        As for the other 'fixed' setup, you may have to reset
the rate back to 4800.

Brian Ellis wrote:
>
> My dilemma is that our physical modem is set at 4800 bps and set not to
> change.  All other systems we dial out to are to specific numbers that
> have modems on the other end set to 4800 bps and set not to change their
> communication rates.
>
> 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.
>
> No such luck huh?
>
> Thanks for your help.
> Brian Ellis
>
> Pat Barber wrote:
> >
> > Generally speaking, the software will have no effect on line speed. The
> > two factors are what modem you have and the modem that answers the call.
> >
> > When the "handshake" procedure runs, the called modem decides if it can
> > run at the requested speed, and if so, it will attempt to do so.
> >
> > Sooooo... what are you calling and what is answering determines line
> > speed. Static and crummy lines will also cause the modem speed to
> > degrade, but again, both modems have to agree to "step down" in speed.
> >
> > How do you know what speed you are transmitting at ???
> >
> > Do you have the switch setting correct for 14.4bps operations ????
> >
> > Can the called modem run at 14.4 ?? and is he setup for 14.4 ????
> >
> > Brian Ellis wrote:
> > >
> > > We have a modem which has the capability to transmit at 14.4 bps rates.
> > > However, all of our current incoming and outgoing communications through
> > > these modems are being done at 4800 bps.
> > >
> > > Does changing the line speed (CHGLINBSC) for a binary synchronous line
> > > attached to a controller/device for synchronous modem communications
> > > change the connection speed the modem will communicate at?
> > >
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--
Best Regards
Ken Shields
Home phone: 905 404-2062
Bus  phone  905 725-1144 (326)