IBM Knowledge Center for Personal Communications
You can find documentation and links to other resources at the IBM Knowledge Center for Personal Communications 13.0 at https://www.ibm.com/docs/en/personal-communications/16.0.
The Knowledge Center provides information in English and Japanese. To view the Japanese content, you must be using a system with a Japanese regional setting. All other regional settings will default to the English content.
The Knowledge Center with a Japanese regional setting also contains FAQs and troubleshooting tips.