Al, the SR731-HA wireless repeater would be
the best solution. Adding another
transceiver (TM751-HA) may or may not work.
There has been discussion in this forum in
the past that 2 transceivers in the same
area will cancel each other out. Other
people have said that using two transceivers
has had no side effects. I have one in my
house (centrally located) and one in my
garage. I believe that if there is a
cancelling problem, my units are far enough
apart so that the problem does not manifest
itself.
However, the TM751 converts RF signals to
powerline signals. I don't know if the cm15a
[AHP USB Interface] is capable of
reading/responding to powerline signals. I'm
not familiar with the software. If it cannot
respond to powerline signals, then the SR731-
HA wireless repeater would be the only
solution.