Broadband Routers and Network Element manufacturers generally put a feature in their devices, which allows the users to access their devices through the web browser, running on ay computer, which is connected to that device. Generally, it is through a private IP Address like 192.169.1.1, whiche you have to type in your browser’s address bar.
To prevent un-authorized use, the manufacturers also set a default username and passwords in the firmware of their device. You have to enter that login detail so as to access the settingbs page of your device. You are also allowed to change these login details as per your convenience and liking.
In case, a user forgets this changed passwords, which is so common and frequent as these settings are not changes on a frequent basis, then generally he is allowed to reset the settings of the router to the factory default through a hardware reset butting, usually provided on the chassis of the device.
3Com Router Username Password List
In case you have forgotten the default username and password of your 3Com Router or Broadband device, then here is a complete list of the default login details for some of the most popular models of 3Com. Use the list as per your convenience.
| Vendor | Model | Version | Access Type | Username | PASSWORD | Privileges | Notes |
| 3COM | CoreBuilder | 7000/6000/3500/2500 | Telnet | debug | synnet | ||
| 3COM | CoreBuilder | 7000/6000/3500/2500 | Telnet | tech | tech | ||
| 3COM | HiPerARC | v4.1.x | Telnet | adm | (none) | ||
| 3COM | LANplex | 2500 | Telnet | debug | synnet | ||
| 3COM | LANplex | 2500 | Telnet | tech | tech | ||
| 3COM | LinkSwitch | 2000/2700 | Telnet | tech | tech | ||
| 3COM | NetBuilder | SNMP | ANYCOM | snmp-read | |||
| 3COM | NetBuilder | SNMP | ILMI | snmp-read | |||
| 3COM | Netbuilder | Multi | admin | (none) | Admin | ||
| 3COM | Office Connect ISDN Routers | 5×0 | Telnet | n/a | PASSWORD | Admin | |
| 3COM | SuperStack II Switch | 2200 | Telnet | debug | synnet | ||
| 3COM | SuperStack II Switch | 2700 | Telnet | tech | tech | ||
| 3COM | OfficeConnect 812 ADSL | Multi | adminttd | adminttd | Admin | ||
| 3COM | Wireless AP | ANY | Multi | admin | comcomcom | Admin | Works on all 3com wireless APs |
| 3COM | CellPlex | 7000 | Telnet | tech | tech | User | |
| 3COM | cellplex | 7000 | Telnet | admin | admin | Admin | |
| 3com | cellplex | 7000 | Telnet | operator | (none) | Admin | |
| 3COM | HiPerARC | v4.1.x | Telnet | adm | (none) | Admin | |
| 3com | 3Com SuperStack 3 Switch 3300XM | Multi | security | security | Admin | ||
| 3com | superstack II | 1100/3300 | Console | 3comcso | RIP000 | initialize | resets all pws to defaults |
| 3COM | LANplex | 2500 | Telnet | tech | (none) | Admin | |
| 3COM | CellPlex | HTTP | admin | synnet | Admin | ||
| 3com | NetBuilder | SNMP | (none) | admin | User | SNMP_READ | |
| 3COM | SuperStack II Switch | 2700 | Telnet | tech | tech | Admin | |
| 3COM | CellPlex | 7000 | Telnet | root | (none) | Admin | |
| 3COM | HiPerACT | v4.1.x | Telnet | admin | (none) | Admin | |
| 3COM | CellPlex | 7000 | Telnet | tech | (none) | Admin | |
| 3COM | CellPlex | 7000 | Telnet | admin | admin | Admin | |
| 3com | CellPlex | 7000 | Telnet | tech | tech | Admin | |
| 3com | super | Telnet | admin | (none) | Admin | ||
| 3com | cellplex | 7000 | Multi | admin | admin | Admin | RS-232/telnet |
| 3COM | SuperStack 3 | 4XXX | Multi | admin | (none) | Admin | |
| 3COM | SuperStack 3 | 4XXX | Multi | monitor | monitor | User | |
| 3COM | SuperStack 3 | 4400-49XX | Multi | manager | manager | User can access/change operational setting but not security settings | |
| 3com | CellPlex | 7000 | Telnet | root | (none) | Admin | |
| 3com | Netbuilder | Multi | admin | (none) | Admin | ||
| 3com | cellplex | 7000 | Telnet | operator | (none) | Admin | |
| 3com | OfficeConnect 812 ADSL | 01.50-01 | Multi | admin | (none) | Admin | |
| 3com | cellplex | Multi | admin | admin | Admin | ||
| 3com | HiPerACT | v4.1.x | Telnet | admin | (none) | Admin | |
| 3com | 3c16405 | Multi | n/a | (none) | Admin | ||
| 3com | 3c16405 | Console | Administrator | (none) | Admin | ||
| 3com | Switch | 3300XM | Multi | admin | admin | Admin | |
| 3com | SS III Switch | 4xxx (4900 – sure) | Telnet | recovery | recovery | resets_all_to_default | u need to power off unit. tbl_ |
| 3com | OfficeConnect Wireless 11g Cable/DSL Gateway | HTTP | (none) | admin | Admin | ||
| 3COM | Netbuilder | HTTP | Root | (none) | Admin | ||
| 3com | 3C16405 | Multi | admin | (none) | Admin | ||
| 3COM | 3C16450 | Multi | admin | (none) | Admin | telnet or serial | |
| 3COM | 3C16406 | Multi | admin | (none) | Admin | telnet or serial | |
| 3com | OfficeConnect 812 ADSL | 01.50-01 | Multi | admin | (none) | Admin | |
| 3com | cellplex | Multi | n/a | (none) | Admin | ||
| 3com | cellplex | Multi | admin | admin | Admin | ||
| 3com | HiPerACT | v4.1.x | Telnet | admin | (none) | Admin | |
| 3com | 3c16405 | Console | Administrator | (none) | Admin | ||
| 3com | CellPlex | 7000 | Telnet | tech | (none) | Admin | |
| 3com | Switch | 3300XM | Multi | admin | admin | Admin | |
| 3com | SS III Switch | 4xxx (4900 – sure) | Telnet | recovery | recovery | resets_all_to_default | u need to power off unit. tbl_ |
| 3com | OfficeConnect Wireless 11g Cable/DSL Gateway | HTTP | (none) | admin | Admin | ||
| 3com | 3CRADSL72 | 1.2 | Multi | (none) | 1234admin | Admin | snmp open by default with public / private community |
| 3com | CB9000 / 4007 | 3 | Console | Type User: FORCE | (none) | Admin | This will recover a lost password and reset the switch config to Factory Default |
| 3com | officeconnect | Multi | n/a | (none) | Admin | ||
| 3Com | Internet Firewall | 3C16770 | HTTP | admin | password | Admin | |
| 3com | superstack II Netbuilder | 11.1 | Multi | n/a | (none) | Admin | |
| 3COM | Office Connect ISDN Routers | 5×0 | Telnet? | n/a | PASSWORD | Admin |
Source: http://www.adslrouter.co.za/default-password/3com.html
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Router Passwords
Others Posts in the Series Include...
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- Ubee Modem Default Passwords - Router Username, Login Details
- Huawei Echolife Router Default Passwords - HG520c, HG520s, HG520b
- Enterasys Networks Default Password - Login, Username
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- 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

