X.75 vs. V.120

Heiko Schlittermann (heiko@os.inf.tu-dresden.de)
Tue, 19 Aug 1997 13:12:21 +0200

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Hi out there,

admittly I don't understand too much about such protocols as X.75,
V.120, ... I don't now if theses two things are even comparable, but
perhaps one of you out there ;-)

All the following stuff is ISDN only.

I'd like to establish a ``asynchronous'' connection between a
PC w/ ISDN card and a PM3. The PM then should route the call
transparently to a telnet port on a spec. host.

This works almost fine (almost, since ``autolog'' didn't work, but
that could be my fault ;-), if I use my ZyXEL 2864 ISDN-Modem.
I can have the ZyXEL dial into the PM, get a login prompt and then
connect to the destination host/port.

BUT: This only works if I switch the ZyXEL to V.120 (or V120?) mode.
I'd like to have it work too with a built in ISDN card and the ISDN4Linux
driver.

Now I don't know if I've to convince the ISDN card + driver to use V.120
or if I can have the PM to handle X.75 (the preferred way).

Or do I intermix completly unrelated things?

Thanks in advance,

Heiko

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