Editing Caller ID (section)

==Regional differences==
[[File:Caller ID converter.jpg|thumb|right|Converter that converts from DTMF to FSK format]]

Caller ID transmission is implemented using different technologies and standards in some countries.<ref>{{cite web |url=http://www.ainslie.org.uk/callerid/cli_faq.htm |title=Caller ID FAQ |website=Marilyn Ainslie |date=1 April 2004 |access-date=3 February 2015 |url-status=dead |archive-url=https://web.archive.org/web/20150214083456/http://www.ainslie.org.uk/callerid/cli_faq.htm |archive-date=14 February 2015 }}</ref> In the United States the Bellcore FSK standard is prevalent, whereas Taiwan uses ETSI FSK. Sometimes individual service providers within a country use different standards. Caller ID converters can be used to translate from one standard to another.

{| class="wikitable sortable"
|-
! Country
! Caller ID standard
|-
| Australia
| Bellcore FSK
|-
| Brazil
| Bellcore FSK / ETSI FSK / DTMF
|-
| Canada
| Bellcore FSK
|-
| China
| Bellcore FSK / DTMF
|-
| Hong Kong
| Bellcore FSK
|-
| Ireland
| ETSI (Ring Pulse)
|-
| Japan
| ETSI FSK / DTMF
|-
| New Zealand
| Bellcore FSK<ref>{{cite web|url=http://www.telepermit.co.nz/TNA102.pdf|title=Telecom New Zealand TNA 102|access-date=February 14, 2012|archive-date=January 14, 2012|archive-url=https://web.archive.org/web/20120114063446/http://www.telepermit.co.nz/TNA102.pdf|url-status=live}}</ref>
|-
| Norway
| ETSI FSK
|-
| Spain
| ETSI FSK
|-
| Taiwan
| DTMF / ETSI FSK
|-
| United Kingdom
| SIN227 (V.23 FSK, line inversion)<ref>{{cite magazine |url=https://www.telecomarchive.com/docs/bsp-archive/SIN/SIN_227_I3.7.pdf |archive-url=https://web.archive.org/web/20231120030544/https://www.telecomarchive.com/docs/bsp-archive/SIN/SIN_227_I3.7.pdf |url-status=live |archive-date=November 20, 2023 |title=CDS Calling Line Identification Service - Service Description |publisher=[[BT Group|BT Network]] |date=September 2015 |magazine=Suppliers' Information Note |issue=3.7 |volume=SIN 227}}</ref>
|-
| United States
| Bellcore FSK
|}

===UK===
Telephone equipment usually displays CLID information with no difficulty. Modems are notoriously problematic; very few modems support the [[British Telecom]] standard in hardware; drivers for those that do often have [[Software bug|errors]] that prevent CLID information from being recognised.<ref>{{cite web|url=http://www.talkingcallerid.com/ModemDriver.htm|title=How to modify your modem driver file|website=Talking Caller ID |access-date=11 May 2020 |url-status=dead |archive-url=https://web.archive.org/web/20190207043038/http://www.talkingcallerid.com/modemdriver.htm |archive-date=7 February 2019}}</ref> Other UK telephone companies use slight variations on the Bellcore standard, and CLID support is "hit and miss".<ref>{{cite web|url=http://www.ainslie.org.uk/callerid/cli_faq.htm#Q_18 |title=Caller ID FAQ |website=Marilyn Ainslie |date=1 April 2004 |access-date=21 March 2016 |url-status=dead |archive-url=https://web.archive.org/web/20160321143216/http://www.ainslie.org.uk/callerid/cli_faq.htm#Q_18 |archive-date=21 March 2016 }}</ref>

=== Australia ===
CND is currently available in Australia to subscribers to the Integrated Services Digital Network (ISDN). 
There is a legislation under section 276 of the Australia Industry Code - Calling Number Display (ACIF C522: February 2003).<ref>{{cite web |title=Caller Identification |url=http://www.amta.org.au/articles/amta/Caller.Identification |website=AMTA |access-date=11 May 2020 |archive-url=https://web.archive.org/web/20180815005438/http://www.amta.org.au/articles/amta/Caller.Identification |archive-date=15 August 2018 |url-status=dead}}</ref>