I want to use an old Vigor 2600G as a wireless access point with a CAT5 cable back to the ADSL router.

I want to use one of the R-SMA connectors on the 2600G with the stock antenna for nearby clients and the other connector with a 10dB yagi to provide coverage to my office at the far end of the house where signals are weak and watery.

Will this work?

Answered here...

http://www.draytek.com/user/SupportFAQDetail.php?ID=224

...assuming it applies to the 2600G.

So apparently the only benefit would be on receive.