RTS SIP-ISDN, Руководство по аппаратному и программному обеспечению, Страница: 36 / 102

36
MSN (Multiple Subscriber Number)
Usually the entry of a MSN is not necessary. However, if several systems (e.g. RTS
ISDN 2005, fax, telephone, etc.) are operated with one ISDN interface, you can allocate
a certain calling number to a certain system by entering a MSN.
Example: A telephone, an ISDN PC card and a RTS SIP-ISDN unit are operated with
one ISDN interface. From your 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
RTS SIP-ISDN , 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
area code.
Dial In Numbers (Access Protection)
Via the Dial In Numbers function an access protection for the system can be activated.
All calling numbers which are entered in the list can establish a connection with the sys-
tem. Please enter
Name and Number for each list entry.
• With
Add
you can create a new entry
FIG. 19 CREATING A NEW ENTRY
NOTE
Some PABX require the entry of a MSN since otherwise no operation is possible.
If you cannot establish a connection between the RTS SIP-ISDN system and a part-
ner system, but you are sure that the ISDN line is working, you should try if it works
after entering a MSN.
NOTE Please consider that only chyphers which are actually entered are analysed, i.e. if you
only enter „130“, all participants with a calling number which ends with „123“ are
allowed to call the system.
The total character length of all entered telephone numbers must not be higher than
127. With an average length of a telephone number of 12 characters about 10 calling
numbers can be saved.
For this functionality the calling number of the participants in the list needs to be
transmitted (CLIP
1
function).
1. Calling Line Identification Presentation