It does not have that ability. You would have to load third party firmware. Normally I recommend dd-wrt but since this is a dsl device it is unlikely there will be a image. openwrt might have a image, they have non standard images where they load a non dsl code base into a dsl router...which of course makes the dsl not work which is not a issue in your particular case.
The key to remember is a repeater will degrade the signal for all devices in the house. You trade performance for coverage.