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From: urlichs@smurf.sub.org (Matthias Urlichs)
Newsgroups: comp.dcom.modems
Subject: Re: PEP -vs- MNP (Class 9)
Keywords: PEP
Message-ID: <1990Mar20.104122.13603@smurf.sub.org>
Date: 20 Mar 90 10:41:22 GMT
References: <897@lectroid.sw.stratus.com> <627@braaten.doit.sub.org>
Organization: University of Karlsruhe, FRG
Lines: 45

In comp.dcom.modems, article <627@braaten.doit.sub.org>,
  ed@braaten.doit.sub.org (Ed Braaten) writes:
< 
< Re: certification.  Let's hope that Europe 1992 forces the PTTs
< across Europe to make some changes.  Example:  The German PTT
< (Telekom) recently introduced a modem that is basically a Telebit
< Trailblazer with some ROM changes.  The price to buy this modem 
< which has the Telekom's "certification"  is over 6000 DM.  You
< can buy the same modem (sans ROM/power supply changes) in an 
< "export-only" version for 2-3000 DM.
< 
6000 DM, btw, are about $3500. You can get two or three T2500s for
that.
They didn't only change the ROMs, but also hacked the hardware, which might
contribute to the problem described below.

< Comments from Telebit?  Was more changed than just the ROMS -
< is it worth the difference in price?
< 
You forgot the :-) and the :-( here. (Lots of :-(s, to be exact.)

If you have the German "Kabelmetall" version (which does not even have V.32;
Kabelmetall is the company who did the adaption to the Telekom idea of what
international standards are supposed to be like), you can _not_ dial into a
T2500 in PEP mode.

Don't ask me why. It just won't work. All other combinations are OK (ie, you
can dial up a T1000 from the Kabelmetall modem, or you can dial into the
Kabelmetall modem from a T2500, in PEP mode).
< 
They also introduced some stupid limitations on register settings.
For instance, S10 (carrier loss to disconnect time) is either 250 msec or ten
seconds. No other setting of that register will be accepted. :-( :-( :-(

The German translation of the manual of course adheres to the German idea
of how to name wires and handshakes and stuff, and thus manages to be
virtually unreadable.

I'd advise anyone who wants a PEP modem to buy a T2500.
The University of Karlsruhe has one also; we asked the Telekom "network
coordinator" if he had any problems with the modem not being "certified".
He said no, so the modem stayed. Works flawlessly, too.

-- 
Matthias Urlichs