33
MD Evolution – Dialog 4223 Professional
Operations for Outgoing Calls
Discrimination and Routing of External 
Calls
Usually, you have access rights to the public network and all private 
networks to which your facility is connected. You also usually have 
the authorisation to dial any type of external number, most particularly 
a public number.
In terms of the facility programming dictated by your system 
administrator, there may be certain external numbers that are 
discriminated.
Most particularly, this may apply to numbers for service provided by 
the public network, or certain international destinations. An attempt 
to dial these numbers would be automatically refused.
Moreover, your facility will also most often be equipped with a Least 
Cost Routing (LCR) service for external calls, especially if your facility 
is connected to private networks or different public network operators.
The LCR service therefore automatically ensures that the routing of 
external numbers you dial will be processed with the least possible 
cost, or managed according to the most optimal calling route.
Note: The numbers dialled using abbreviated dialling are 
never subjected to any type of discrimination. If you have a 
specific need or question concerning discriminated numbers, 
you may ask your system administrator or facility attendants 
that the numbers in questions be added to the list of abbre-
viated dialling numbers.