(b) if:
(ii) another form of communication that is equivalent to voice telephony (for example, communication by means of a teletypewriter) would be required to be supplied to the end-user in order to comply with the Disability Discrimination Act 1992 ;
(c) a purpose declared by the regulations to be a designated purpose for the purposes of that provision;
(e) to the extent that the service is for the purpose referred to in paragraph (a)--the service has the characteristics (if any) declared by the regulations to be the designated characteristics in relation to that service for the purposes of that provision; and
(f) to the extent that the service is for the purpose referred to in paragraph (b)--the service has the characteristics (if any) declared by the regulations to be the designated characteristics in relation to that service for the purposes of that provision; and
(g) to the extent that the service is for a particular purpose referred to in paragraph (c)--the service has the characteristics (if any) declared by the regulations to be the designated characteristics in relation to that service for the purposes of that provision.
(3) The following are examples of purposes that could be declared by regulations made for the purposes of paragraph (1)(c):
(b) the purpose of tone signalling.
(b) such other matters (if any) as the Minister considers relevant.
(6) In this section:
this Act includes the Telecommunications Act 1997 .