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Windows PC Software
MSN (Multiple Subscriber Number)
Usually the entry of a MSN is not necessary. However, if several systems are
operated with one ISDN interface, you can allocate a certain calling number
to a certain system by entering a MSN. If you order an ISDN connection in
Germany, in general you will get three MSN, which you can use for your con-
nected units.
Example: A telephone, an ISDN PC card and a MAGIC DC7/AC1 XIP system
unit are operated with one ISDN interface. From your network provider you
got the following MSN: 5271011, 5271012, 5271013.
Without a MSN entry, all three units respond to the incoming call - no matter
which of the three calling numbers was dialled. However, if a different MSN
is allocated to each unit , the system only responds if exactly this MSN was
dialled by the caller. If you enter e.g. the MSN ’5271013’ for the MAGIC
DC7/AC1 XIP system, the system will only signal the call, if the caller dialled
’5271013’. However, precondition for this example is that you enter the same
MSN for MSN 1 and MSN 2.
Enter the desired MSN under MSN 1 respectively MSN 2. Of course, the same
MSN can be allocated for both B channels. Please notice that a MSN is always
entered without an area code.
NOTE
Some PABX require the entry of a MSN since otherwise no operation is pos-
sible.
If you cannot establish a connection between MAGIC DC7/AC1 XIP system
and a partner system, but you are sure that the ISDN line is working, you
should try whether it works after entering a MSN.
ISDN
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