Australia, China, Hong Kong, Singapore, Italy (?) and by most UK cable companies.
It sends the data after the first ring tone and uses the 1200 baud Bell tone modulation. The data may be sent in Single Data Message Format (SDMF) which includes the date, time and number or in Multiple Data Message Format (MDMF) which adds a NAME field. http://testmark.com/callerid.html has more details. • British Telecom developed their own standard, which wakes up the display with a line reversal, then sends the data as CCITT modem tones in MDMF. It is used by BT, wireless networks like the late Ionica, and some cable companies (Nynex?). Details are to be found in Supplier Information Notes (SINs) 227 and 242; another useful document is “Designing Caller Identification Delivery Using XR-2211 for B.T.” from the EXAR website. • The Cable Communications Association in the UK developed their own standard which is similar to BT’s, but can cope with American switches.
Related Questions
- The Bellcore standard is used in the USA, Canada (but see below), Australia, China, Hong Kong and Singapore (who have their own standard?
- Is there an xda repair center in Singapore/Hong Kong/Malaysia/Australia or must I send my unit over to the UK?
- Australia, China, Hong Kong, Singapore, Italy (?) and by most UK cable companies.
