I have one: YGW30 1FXS,1FXO SIP ATA unit it was made by company Yuxin I think they are no longer in business.
I forgot the default user name / password for log-in. Does anybody know what was the default login or have a manual?
Behold: The Wayback Machine. Link to manual: http://web.archive.org/web/20070224144946/http://www.yntx.com/files/YGW30en.rar
Manual says user/pass is root/test.