Discrimination and routing of external calls – AASTRA 4425 IP Vision for MD Evolution User Guide User Manual

Page 67

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MD Evolution – Dialog 4425 IP Vision

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.

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