System Functions and Features as of I7.9
312
Features
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8. 2. 4. 2
Virtual Networking in the ISDN Network
In a virtual networking or in a virtual PINX in the public network the following con-
ditions have to be met:
•
The feature is supported end-to-end by the public ISDN network.
•
Service compatibility between private ISDN and public ISDN is guaranteed for
the feature.
Example: Callback if busy
"Callback if busy" is supported within the private network. Compatibility for this
feature between private network (QSIG protocol) and public network (DSS1 proto-
col) is guaranteed. It is possible to activate callback between A and C and between
B and C (
) if the public network supports the feature end-to-end.
Fig. 161
Using a feature via the public network
Note:
With the overflow procedure (see
"Testing overflow routing in the PISN",
) calls within the PISN are routed via the public network. In this
case the conditions for networking with DSS1 apply. The ranges of serv-
ices available can be restricted for such calls.
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