If you want one you need to go and see your HR staff and ask. A few things to bear in mind:
They are intended for people who work in remote locations and have no access to DII (embassies, people working in industry etc etc) You will not get one just because it's convienient or because you only have access to DII once a week.
You don't want one anyway! It doesn't do what you think it's going to do. Irrespective of how many actors you have in JPA the only things you can access are the self-service functions for leave, personal details and expenses. You cannot read, write, update or submit OJARs/SJARs or anything else that uses the Oracle apps using it.
If you have the option, go and see your C4I people and ask them for a DII laptop. At least with that you get the full JPA experience as if you are sat at your desk and you can send and receive emails.