If I didn't get you wrong, you just want to get Internet from your office router via MR200, right? Then MR200 shares the Internet? If so, please reset your MR200 and set it to work on Router Mode....

I didn't get that. Maybe you could explain yourself one more time.

Hi Jack, I got a beta firmware, maybe you could have it a try. http://support.tp-link.com/f/8c45114872/?dl=1. Good luck.

I think you will need a modem to work with you C2300. However, contact your Internet service provider directly is always the best choice.

Describe your issue in English and more people may provide help, I think.

I'm afraid that it won't work with C7.