Default username and passwords allow the users of these devices to access and alter their settings through a browser running on the computer to which these devices are attached. These default login details are fabricated within the firmware of the product and allow you to access the device in case you forgot your passwords.
You just have to reset the device to the default factory settings and then the password, you have set yourself will get erased and replaced by the factory default settings.
About Billion:
Billion Electric Co. Ltd., based in Taiwan, was founded in 1973. Billion is one of the providers of network equipments and power supply products in Asia Pacific rim. Since its Communication Division was established in 1992, Billion has re-enforced its investment in developing next generation network equipments and Internet access devices for home, telecommuters, and SME users.
BILLION brand is officially launched in 2004.
In the past few years Billion has been developing and offering ADSL/ADSL2+, SHDSL, and VPN Router products to meet the growing demands of varying broadband market segments. The product lines include following series:
- Billion ADSL Modem/Router
- Billion Wireless ADSL Router
- Billion 3G / ADSL2+ Router
- Billion Home Networking Router
- Billion VoIP Modem/Router
- Billion VDSL2 Modem/Router
- Billion SHDSL Bridge/Router
- Billion iBusiness Security Appliance (IPSec/SSL)
- Billion ISDN Product
Here is a list of default username and passwords for some of the most popular models of Billion.
some of the m
| Vendor – Model | Username | Password |
| Billion – 400G | admin | admin |
| Billion – 800VGT | admin | admin |
| Billion – BiPac 5100 | admin | admin |
| Billion – BiPac 5100A | admin | admin |
| Billion – BiPac 5102S | admin | admin |
| Billion – BiPac 5112S | admin | password |
| Billion – BiPac 5200G | admin | admin |
| Billion – BiPac 5200N | admin | admin |
| Billion – BiPac 5200N RC | admin | admin |
| Billion – BiPac 5200S R3 | admin | admin |
| Billion – BiPac 5210S | admin | admin |
| Billion – BiPac 7300G | admin | admin |
| Billion – BiPac 7300GA | admin | admin |
| Billion – BiPac 7300N | admin | admin |
| Billion – BiPac 7300RA 4 | admin | admin |
| Billion – BiPac 7401VGP R3 | admin | admin |
| Billion – BiPac 7402GXL | admin | admin |
| Billion – BiPac 7404VNPX | admin | admin |
| Billion – BiPac 7500G | admin | password |
| Billion – BiPac 7800N | admin | admin |
| Billion – myGuard 7202GA | admin | admin |
Source: http://www.pcwintech.com/default-router-modem-passwords
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Router Passwords
Others Posts in the Series Include...
- TP Link Router Passwords - Default Login Username Passwords
- Ubee Modem Default Passwords - Router Username, Login Details
- Huawei Echolife Router Default Passwords - HG520c, HG520s, HG520b
- Enterasys Networks Default Password - Login, Username
- Allied Telesis (Telesyn) Router Default Password, Login, Username List
- Draytek Router Default Password - Login Username Help for Draytek
- Asus Router Passwords - Default Login Username For Asus Broadband Modems
- Apple Airport Extreme Base Station Default Password Login Details
- Billion Router Default Passwords - Username, Login Configuration
- Buffalo Router Default Password Configuration - Login Username List
- Cisco ADSL Router Default Passwords – Guest Access Login Details
- 3Com Router Passwords - Default Login for 3 Com Broadband Modems
- Belkin Router Passwords - Default Login Username List
- Trendnet Router Passwords - Default Username
- Default Linksys Router Password
- Thomson Router Default Password - Thompson Gateway Modem Login
- Default DLink Router Password
- Zyxel Router Password: Default Modem Login Username List
- SMC Router Passwords: Wireless Router Default Login Username List
- Westell Default Passwords: Login Username for Modems / Routers
- 2Wire Routers - Default Password List for 2 Wire Broadband Routers
- Belkin Router Password: Login Username for Wireless Modems


hmmm doesn't work for me and I didn't change anything.