AGFEO AS 100 IT, Manual

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E - 6
Introduction
Important notes on using ISDN terminals
You may connect up to eight ISDN terminals to one SO Bus of the telephone system.
ISDN terminals:
-AGFEO Digital System Telephones
-ISDN Telephones
-ISDN Cards
-ISDN Fax Machines
Depending on current consumption, you may connect at least four ISDN terminals that do
not have a power supply of their own.
Example:4 ISDN telephones or 2 digital system telephones plus 2 ISDN telephones.
All ISDN terminals must be approved ISDN terminals (DSS 1).
The internal S0 access is like a point-to-multipoint connection any available extension
number from the system may be assigned to it. The 2 digit extension number will be treated
like a multiple subscriber number (MSN). You can enter one or several of these MSN’s in
your ISDN terminal. If you should use this method, then please refer to the ISDN
terminal’s operationg instruction. The multiple subscriber number is the ISDN -terminal
’s internal and Direct Dial Inward (DDI) number.
From an ISDN terminal, you call any internal extension free of charge by dialling the
corresponding internal phone number. You can make external calls after seizure of an
outside line by dialling 9 (0). If the port is set to ‚spontaneous exchange line seizure with
internal‘ then you must press the R button before dialling an internal number. If your Ter-
minal has no R button or does not support this function then it will not be possible to make
internal calls. ISDN telephones must use the same functions as analogue phones. For
example you must press the star button before a function code is dialled. For ISDN phones
that do not have a star button, you dial 99 instead.
To make an enquiry call you must have an R button on your ISDN telephone.
When programming the system, please ensure that the system confirmation tone is
returned to you. If the confirmation tone is not returned or you receive an error tone, then
you must re-enter the last entry.
The following can be displayed on your ISDN telephone:
-Caller ’s phone number (internal and -external)
-Connection charges
-Date and time after the first internal -connection
You can only make restricted use of the menu promt functions.