Call routing
210
System functions and features as of R3.0
syd-0367/1.3 – R3.0 – 03.2013
Examples of digit barring facilities
A user or user group may only dial the following external destinations:
• Destinations within their own network group
• Destinations of network group 031 and 033
• Destinations in Germany (0049)
The following restrictions also apply:
• No external connections through cost centre selection
• No external connections through route selection
These two restrictions are regulated using the internal barred-code; the others, us-
ing the external digit barring:
Fig. 87 Example of digit barring facilities
In this example the exchange access prefixes are entered as follows in the number-
ing plan:
• Exchange access for cost-centre selection: 13
• Exchange access for route selection: 17x
Function code *78 is used to allocate a cost centre using suffix dialling. That is why
the digit sequence *78 is also barred.
Default settings
After an initialization a number of digit barring options already have pre-entered
digit sequences. They can vary from country to country.
Examples of digit barring initialization values:
• External digit barring 1:
Internal: All barred except service and emergency numbers.
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