Networking With A Virtual Pbx (Centrex) - ASCOM Ascotel 2025 System Manual

6.4

Networking with a Virtual PBX (Centrex)

The link-up of a virtual PBX in the public network is implemented in exactly the
same way as the networking of two systems.
Fig. 3.72: Networking with Centrex
System 1 is connected with Centrex. A DDI range 200...299 is defined there.
I. e., Centrex regards all numbers 200...299 as internal numbers in the Centrex
range in system 1.
The Centrex range also contains other internal numbers, e.g. 300 and 350.
If subscriber 300 wants to reach subscriber 250, he simply dials 250.
HBT_20321104_03/B0_en
Centrex
Transition
DDI 200.. 299
ascom Ascotel 2025/2045/2065
300
350
PINX 1
200.. 299
haz0816aaena0
Planning a Private Network
250
3.129