VoIP

Hi all.

UK user here. I've just converted my land line to digital and bought an SIP phone on Amazon - Yealink T46U.

I've plugged this phone into my router, it's detected the network fine, and all firmware has been downloaded and up to date.

I can hear a dial tone, but I don't seem to be able to make or recieve calls, so need to check the SIP phone settings. However the settings are password protected on both the phone and the web interface. Issue is: the default username/pword in the manual (admin/admin) isn't working! I'm tearing my hair out here - I've tried all combinations of capitals but to no avail. Access denied.

Two things occur to me:

1. Could it somehow be downloading username and password details for VOIP service from my service provider? (Zen Internet). Not sure why this would be, as I can plug a standard land line phone into the 'FON' port on my router and that all works fine.

2. Have I bought the wrong phone? Ie is this phone meant for an enterprise setup where there is a dedicated provisioning server involved and not for lowly home users like me? Originally I tried this with a Cisco phone (had it at home from a previous job where recorded lines were required) and I tried to plu the Cisco phone in, only to be asked to enter the Cisco server address. A quick search informed me that with Cisco phones you need a dedicated server in an enterprise environment. Could it be the same deal with this Yealink phone?

Any help on this gratefully appreciated. Thanks all!