This past week I visited my brother. He is with xnet and was capped because he had exceeded his cap. It was a holiday so we didn't feel like ringing up the helpdesk. Anyway, his brother in law, who is also with xnet just changed the ADSL login to his login, and the internet was back to full speed again.

Did this work because both parties were with xnet, or would it have also worked if they were with different isps (e.g. one with xnet and one with snap)?

[I guess it won't work with Telecom as i understand that they authenticate by port rather than login, and it wouldn't work for llu lines either, but would it work for other isps that rely on Telecom wholesale.]

Nothing urgent, just more curiousity than anything.