How should a fax machine number (045) 334-5678 in Japan be formatted for Inmarsat-C?

The correct format for the fax machine number (045) 334-5678 in Japan to be used for Inmarsat-C communication is 810453345678. This formatting adheres to the international dialing conventions that require the country code to be prefixed by '81' when dialing from abroad, with the zero in the area code being omitted.

After the country code, the specific area code and the local number are concatenated without any spaces or additional characters. In this case, omitting the zero from '045' and simply combining all parts—country code, area code, and local number—results in the sequence 810453345678. This ensures successful connectivity without confusion or errors in the dialing process.

While the other formats include elements of the fax number, they introduce characters like parentheses or spaces that are not compatible with the requirements for the Inmarsat-C system, which expects a streamlined and continuous number sequence for dialing.