broadband router UDP packet loss

I have a Netgear FR114W router connected to my cable modem on my Telewest
Blueyonder 1.5M service (1.5M downstream/256K upstream).

I am attempting to run H.323 videoconferencing over this connection using
a PolyCom ViaVideo II but get around 10% packet loss which causes the
ViaVideo software to keep lowering the transmit video rate to try and
compensate but eventually the transmit video shuts down entirely.

If I remove the FR114W and connect the PC/ViaVideo to the cable modem directly
then I get no (or acceptable) packet loss.

I would guess that the FR114W is toiling to keep up the the UDP data stream
(bi-directional ~240K).

Will any of the other consumer cable routers cope (better) with this?