ASCOM Ascotel 2025 - PISN with Regions

ascom Ascotel 2025/2045/2065
HBT_20321104_01/B0_en Networking the Systems 1.43
4.6.2 PISN with Regions
If a PISN is subdivided into several regions, each own regional prefix is determined
in the internal numbering plan of each PINX.
Subscribers who call a subscriber in a different region first dial the regional prefix
of the destination region, followed by the internal number of the subscriber they
want.
The numbering plan is organized independently of the PISN topology.
Fig. 1.30: PISN with two regions and shared numbering plan for Region 50
The purpose dividing into regions is that then the existing DDI numbers can con-
tinue to be used.
Own regional prefix 50
Internal subscribers 200 ... 299
PISN subscribers 300 ... 399
60200 ... 60299
Own regional prefix 50
Internal subscribers 300 ... 399
PISN subscribers 200 ... 299
60200 ... 60299
Shared numbering plan
PINX 1 numbering plan
PINX 2 numbering plan
Own regional prefix 60
Internal subscribers 200 ... 299
PISN subscribers 50200 ... 50399
PINX 3 numbering plan
Region 50 Region 60
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PINX 1 PINX 2 PINX 3