To specify a regional analog voice-interface-related tone, ring, and cadence setting, use the cptone command in voice-port configuration mode. To disable the selected tone, use the no form of this command.

Command description:
voice-port slot/mod
cptone {locale}
no cptone {locale}

The locale specifies the voice-interface-related default tone, ring, and cadence setting for a specified country.

Cptone is also used for Caller-ID presentation; several standards are used for this:

For Telcordia Caller-ID support in North America Australia, China, Hong Kong, and Singapore, Telcordia Technologies (formerly Bellcore) GR-30-CORE
For European Telecommunication Standards Institute (ETSI) Caller-ID support in France, Germany, Norway, Italy, Spain, South Africa, Turkey, and UK (CCA), European Telecommunication Standard ETS 300 648, ETS 300 659-1
For ETSI Caller-ID support in UK (British Telecom), British Telecomm SIN227, SIN242
For NT FSK Caller-ID support in Japan, Nippon Telegraph & Telephone Corporation standard
For DTMF-based Caller-ID support in Brazil, Belgium, Sweden, Denmark, Holland, Iceland, and Saudi Arabia, ETS 300 648, ETS 300 659-1

See the table below for the valid options.