jdmatt: Can some explain why a small change it the mtu could fix this issue? I'm not even sure if this change was what fixed it or it could have been the verbal abuse I hurled at it the night before! But I thought 1500 was the default size for pppoa? I haven't tested this theory on the netgear router yet but it also had a 1500 mtu.

Here's a good article on optimal MTU for ADSL: http://www.whirlpool.net.au/wiki/ADSL_Theory_PPP

I'm not 100% sure how the MTU could cause a problem. The only thing I can think of is fragmentation. If your MTU is set too high, the LCP messages will be split into multiple parts as they hit lower-MTU parts of the path. I guess it's possible that a fragmented LCP message could cause a problem.

jdmatt: @nzgeek, yes I do have a terrible downstream attenuation, a whopping stable 63.5dB but this is due to the distance from my exchange around 7km. I Sync around 2400kbps @12dB SNR, have tweaked SNR in past to sync stable around 3400kbps @6dB. Although I think the attenuation in this case is not relevant due to past experiences on telecom where I have had stable connection for weeks at a time, and the problem only presenting it self after ISP change. Also both routers have a broadcom chipset.

Ouch! Those are some pretty low speeds. At least it's better than dial-up.

It's good that your modems use Broadcom chips. From what I've read, they sync slightly slower but provide a much more stable connection than some of the other chips on the market. At the sort of attenuation levels you're getting, every little bit helps.

Fingers crossed your connection stays stable!