Pisn With Regions - ASCOM Ascotel 2025 System Manual

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.
PINX 1 numbering plan
Own regional prefix
Internal subscribers
PISN subscribers
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.
HBT_20321104_01/B0_en
Region 50
PINX 1 PINX 2
PINX 2 numbering plan
50 Own regional prefix
200 ... 299 Internal subscribers
300 ... 399 PISN subscribers
60200 ... 60299
Shared numbering plan
ascom Ascotel 2025/2045/2065
50
Own regional prefix
300 ... 399
Internal subscribers
200 ... 299
PISN subscribers
60200 ... 60299
Networking the Systems
Region 60
PINX 3
PINX 3 numbering plan
60
200 ... 299
50200 ... 50399
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1.43