AASTRA 4422 IP Office for MD Evolution User Guide - Manual (Page 36)

Operations for Outgoing Calls
MD Evolution – Dialog 4422 IP Office 36
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 admin-
istrator, 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
abbreviated dialling numbers.