# The Telecommunications (Open Network Provision) (Voice Telephony) Regulations 1998, Part 3


(a) Community-wide access to green or freephone services
These services, variously known as green numbers, freephone services, cover dial-up services where the caller pays nothing for the call to the number dialled.
(b) Shared cost services
These services cover dial-up services where the caller pays only part of the cost of the call to the number dialled.
(c) Community-wide premium rate services or shared revenue services
Premium rate service is a facility whereby charges for the use of a service accessed through a telecommunication system are combined with the system call charges.
(d) Community-wide calling-line identification
i.e. the calling party’s number is presented to the called party prior to the call’s being established.
(e) Access to operator services in other Member States
i.e. users in one Member State can call the operator or assistance service in another Member State.
(f) Access to directory information services in other Member States
i.e. users in one Member State can call the directory information service in another Member State.

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Source: https://www.legislation.gov.uk/uksi/1998/1580/schedule/I/part/3 (the official version)
Page: https://openlegislation.uk/telecommunications-open-network-provision-voice-telephony-regulations-1998/schedule-I/part-3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.