Along with call selection, pre-selection is a sort of indirect access for routing calls, in which the user is able to choose a provider other than the one that provides direct access.
Pre-selection implies prior definition of a provider via a specific contract, under which all eligible calls covered by the contract are automatically made through the pre-selected provider.
Call-by-call selection enables each call to be routed by a given provider with whom a contractual relationship has been established, by dialling a code in 10xy format.
Currently a provider may be pre-selected for the two call types (national and international) or for just one of them, or two providers, one for national calls and the other for international calls.
Regarding the eligible call types, stabilised from 1 January 2001, the following are defined:
- National: local, regional, long-distance and fixed-mobile;
- International.
*Frequently asked questions available at Telephone Service at a Fixed Location and Universal Servicehttps://www.anacom.pt/render.jsp?categoryId=326235.
Related information on ANACOM's website:
- Selection and Pre-Selection of Operator https://www.anacom.pt/render.jsp?categoryId=614
