ASCOM Ascotel 2025 - Page 475

ascom Ascotel 2025/2045/2065
2.298 Features HBT_20321104_02/B0_en
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 pro-
tocol) is guaranteed. It is possible to activate callback between A and C and
between B and C (Fig. 2.159) if the public network supports the feature end-to-
end.
Fig. 2.159: Using a feature via the public network
Note:
With the overflow procedure (see "Testing overflow Routing in the
PISN", Page 2.199) calls within the PISN are routed via the public net-
work. In this case the conditions for networking with DSS1 apply. The
ranges of services available can be restricted for such calls.
haz0585aaena0
PISN-SC
DSS1 QSIG
Public
ISDN
Using callback if busy if supported
end-to-end by the public network
C
B
A
PINX
PINX
PINX