Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!bu.edu!transfer!lectroid!peanut!dts
From: dts@peanut.UUCP (Daniel Senie)
Newsgroups: comp.dcom.modems
Subject: Re: T2500 at Bell 103 modulation to Compuserve
Message-ID: <14@peanut.UUCP>
Date: 21 Mar 91 04:52:26 GMT
References: <10@peanut.UUCP> <1991Mar19.194412.18153@netcom.COM>
Organization: Daniel Senie Consulting, Clinton, MA
Lines: 18

I did some more experimenting and found some interesting results. The problem
with 300BPS with T2500 seems to be a problem with auto-reliable mode in MNP.
If I turn off MNP and V.42, everything worked fine. Also, using the modem
with V.42 turned on and falling back to no-protocol (S106=1, S95=0) worked
fine.

Setting up for MNP only with fallback to no-protocol (S106=0, S97=0, S95=2)
fails. In this mode, the tones sound like V.21 instead of Bell 103. I suspect
this is a bug, plain and simple. Incidentally, everything else in the modem
is set for Bell modes as opposed to CCITT modes (for speeds where that matters).

Thanks for the response. I'll see about filing a bug report with Telebit.

-- 
Daniel Senie               UUCP: uunet!lectroid!peanut!dts
Daniel Senie Consulting    ARPA: peanut!dts@lectroid.sw.stratus.com
48 Elm Street              CSRV: 74176,1347
Clinton, MA 01510          TEL.: 508 - 365 - 5352