Operation Manual
150
Appendix A: About the AVM ISDN-Controller M1
You may connect to V.110 terminal adapters, V.110 BBS
ports and to CompuServe’s ISDN dial-in ports. The
following diagram shows the Mobile ISDN protocol stack
for connections to V.110 devices:
Fig. 8 Mobile ISDN Stack, V.110
FRITZ!com, the terminal module of the software suite
FRITZ! included with the Mobile ISDN-Controller M1,
can be configured to V.110 at 9600 bit/s using the
appropriate B-channel setup. This setup allows you to dial
in to V.110 BBSs over Mobile ISDN.
Most ISDN applications (such as Euro-file transfer or
Internet access) however support the synchronous
protocols X.75 or HDLC transparent. These can be used
with the AVM ISDN-Controller B1 or one of the AVM
FRITZ!Cards at the remote end. New drivers are available
on the CD-ROM or from AVM support, see also Chapter 5.
The Mobile ISDN protocol allows you to establish the end-
to-end synchronous digital connections typical of ISDN
between GSM and ISDN terminals. Figures 9 and 10 show
the Mobile ISDN stack at the local and remote ends of
connection, for X.75 and HDLC transparent, respectively:
FRITZ!com
(async. V.110)
CAPI 2.0
B1=2
(
V.110
)
B2=1
(
Tr an s
p
arent
)
B3=0
(
Tr an s
p
arent
)
L2R
RLP
Bfa
L2R
Air Transmission
RLP
S
0
ISDN Line
S
0
V.110
Mobile Station with AVM
Mobile ISDN-Controller M1
and V.110 Application
ISDN V.110 Station
Mobile Switching Center
(MSC)
V.110
CAPI Port
Custom Config
AT S31=2; S51=0
CompuServe
WinCim
Terminal
Adapter
CompuServe