Operation Manual

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Appendix A: Technical Information on GSM Operation
Fig. 10 Mobile ISDN Stack, ISDN X.75 Application
Data compression in accordance with V.42bis can be
enabled for X.75 connections at the ISDN end (see Fig.
10) with the latest drivers for the AVM ISDN-Controller
B1 or AVM FRITZ!Cards. This affords up to four times
greater throughput.
CAPI 2.0
B1=0 (HDLC)
B2=0 (X.75 SLP)
B3=0 (Transparent)
V.42bis
X.75
ISO 3309
L2R
RLP
Bfa
L2R
Air Transmission
RLP
S
0
ISDN Line
S
0
V.110
ISO 3309
Mobile Station with AVM
Mobile ISDN-Controller M2
ISDN Station with
AVM ISDN-Controller B1
Mobile Switching Center
(MSC)
V.110
FRITZ!data
NetWAYS/
ISDN
MPR
for ISDN
FRITZ!data
CAPI 2.0
B1=0 (HDLC)
B2=0 (X.75 SLP)
B3=0 (Transparent)
V.42bis
X.75