Operation Manual
94
1 Introduction
1 Introduction
The AVM Mobile ISDN-Controller M1, in conjunction
with a fax/data-capable cellular phone, permits efficient,
reliable data connections to cellular, ISDN and conventional
analog devices over the digital GSM cellular network.
1.1 GSM, ISDN and Mobile ISDN
GSM (Global System for Mobile Communication) is a
worldwide standard for digital cellular communications
networks. Development of the GSM standard was closely
modelled on ISDN, especially with regard to the services
to be provided and the signalling methods used. Thus
data and telefax connections are supported in addition to
voice calls, for example. In Germany, both the D1 and D2
networks offer telefax and data services.
ISDN is the worldwide digital telecommunications network.
The acronym ISDN stands for Integrated Services Digital
Network. ISDN transmits voice, data and images digitally
over a single network.
The technological innovation Mobile ISDN by AVM permits
data communications with digital reliability and speed
between GSM and ISDN terminal equipment. The link to
ISDN is transparent and carries the usual ISDN
communications protocols. Mobile applications are
supplied with the Common ISDN API (CAPI) application
interface in Version 2.0. The implementation of Mobile
ISDN is documented in international specifications (GSM
07.08).
On connections to an AVM ISDN-Controller B1or one
of the AVM FRITZ!Cards, digital point-to-point
conncections can be established. For more information
on remote equipment and applications supported please
see Chapter 5, "Uses of the AVM Mobile ISDN-Controller
M1".
An important feature of Mobile ISDN is fast call setup.
Connections to ISDN sites are established in just 5
seconds, rather than the usual 20 to 30 seconds of costly
GSM
ISDN
Mobile ISDN
ISDN connections