There are there types of Wi-Fi on SJTU campus.
1. SJTU, is for the students and faculty who have jAccount.
2. SJTU-Guest,is for guest and applied by students and falcuty who have jAccount.
3. Eduroam, is for the guests who are from eduroam participating institutions.
Related links:
How can I connect to the Wi-Fi SJTU?
How to apply guest Wi-Fi?
What is eduroam?