Isdn-pri links to two carriers -6, Model no. running head introduction isdn-pri card, Figure 5-4. isdn-pri links to two carriers – Zhone Technologies 600 User Manual
Page 116
5-6
Server Cards
Model No.
Running Head
Introduction
ISDN-PRI Card
Figure 5-4 shows how the application in Figure 5-3 would be set up if the user’s PBX was not
connected to the system.
The disadvantage of this configuration is that the PBX may not be able to support two D
channels, may not be able to handle the differences in D channel protocols between the two
carriers, and may not be able to route calls to the appropriate carrier.
Figure 5-4. ISDN-PRI Links to Two Carriers
Carrier A
ISDN Switch
Carrier B
ISDN Switch
User Side
User Side
Network Side
Network Side
23B+D
23B+D
ISDN PBX
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