Support for Multiple Subscriber Numbers (MSNs)
Controller B1 – 17 Support for Multiple Subscriber Numbers (MSNs)
105
17 Support for Multiple
Subscriber Numbers (MSNs)
17.1 Introduction
What are MSNs?
Deutsche Telekom provides new ISDN subscribers with Euro-
ISDN lines.
Several terminal devices may be operated at a single ISDN
access. A given terminal device on the Euro-ISDN connection
is selected by dialing the MSN (Multiple Subscriber Number)
assigned to it. Deutsche Telekom provides each Euro-ISDN
subscriber with three MSNs as a standard feature. More
numbers may be requested.
Applications on CAPI 1.1 and MSNs
The assignment of MSNs to terminal equipment is performed
on the terminal equipment itself. The method of addressing
terminal equipment under Germany’s older national ISDN
protocol 1TR6, using a terminal selector digit called the
“EAZ”, is still in use, but no longer supported in Euro-ISDN.
Many DOS, Windows 3.x or Windows 95 applications based
on CAPI version 1.1 support EAZ sub addressing, but not
MSNs.
Euro-ISDN subscribers can still use such applications, how-
ever, simply by configuring them for the EAZ 0 (zero), to re-
spond to all incoming calls regardless of the number dialed.
17.2 Using MSN.EXE
If it becomes necessary to assign a certain MSN to a given
application, however, this can be accomplished by the utility
MSN.EXE. Start MSN.EXE with no command line arguments
to read a summary of all functions.
HB_B1V30.book Seite 105 Mittwoch, 7. Februar 2001 3:19 15