Is there any updated cable-modem on TelstraClear? I've noticed that when doing long uploads (mainly Mozy backups with more than 20GB uploads) the cable-modem will just stop allowing traffic in both directions.

It usually happens after about 10GB of traffic goes up. Obiviously power cycling the cable modem solves the problem but by then it breaks down anything related to Internet traffic, including our landline y communications (VoIP at home with two lines).

Any ideas?