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Possible Solution:
The length of your Ethernet cable between your 24-Port 10/100 Ethernet Switch and your
workstation or computer should not exceed 328 feet. Some power sources with strong
electromagnetic fields may be causing interference.
What kind of cables should I use?
Possible Solution:
The 24-Port 10/100 Ethernet Switch may be used with an RJ-45 Category 5 Ethernet cable.
Where is the uplink port?
Possible Solution:
Each port may be used as an uplink port since each supports auto-crossover. This means that
each port on the 24-Port 10/100 Ethernet Switch automatically allows for connecting additional
hubs, switches, or routers with an RJ-45 Category 5 Ethernet cable.
Are You Still Having Problems?
1. Go to the Support section of the U.S Robotics Web site at www.usr.com
Many of the most common difficulties users experience have been addressed in the FAQ and
Troubleshooting Web pages for your specific product. The model number for the 24-Port 10/100
Ethernet Switch is 7924A. You may need to know this to obtain information on the U.S. Robotics
Web site.
2. Call the U.S. Robotics Technical Support Department
Technical questions about U.S. Robotics products can also be answered by technical support
specialists.
Country Voice Online Support Hours
United States (801) 401-1143 http://www.usr.com/emailsupport 9:00 A.M. - 5:00 P.M., M-F CST
Canada (801) 401-1143 http://www.usr.com/emailsupport 9:00 A.M. - 5:00 P.M., M-F CST
Austria 07 110 900 116 http://www.usr.com/emailsupport/de 7:45A.M.–4:45P.M.,M-F
Belgium (Flemish) +32 (0)70 233 545 emea_modemsupport@usr.com 9:00A.M.–6:00P.M.,M-F
Belgium (French) +32 (0)70 233 546 emea_modemsupport@usr.com 9:00A.M.–6:00P.M.,M-F
Denmark +45 7010 4030 emea_modemsupport@usr.com 9:00A.M.–5:00P.M.,M-F
Finland +358 98 171 0015 emea_modemsupport@usr.com 10:00A.M.–6:00P.M.,M-F
France 082 507 0693 http://www.usr.com/emailsupport/fr 8:00A.M.–5:00P.M.,M-F
Germany 01805671548 http://www.usr.com/emailsupport/de 7:45A.M.–4:45P.M.,M-F
Hungary 01805671548 emea_modemsupport@usr.com 8:00A.M.–6:00P.M.,M-F
Ireland +44 870 844 4546 emea_modemsupport@usr.com 9:00A.M.–6:00P.M.,M-F
Italy 848 80 9903 http://www.usr.com/emailsupport/it 9:00A.M.–6:00P.M.,M-F
Luxembourg +352 342 080 8318 emea_modemsupport@usr.com 9:00A.M.–6:00P.M.,M-F
Middle East/Africa +44 870 844 4546 me_modemsupport@usr.com 9:00A.M.–6:00P.M.,M-F
Netherlands 0900 20 25 857 emea_modemsupport@usr.com 9:00A.M.–6:00P.M.,M-F
Norway +47 23 50 0097 emea_modemsupport@usr.com 9:00A.M.–5:00P.M.,M-F
Poland emea_modemsupport@usr.com 8:00A.M.–6:00P.M.,M-F
Portugal +351 (0)21 415 4034 http://www.usr.com/emailsupport/pt 9:00A.M.–5:00P.M.,M-F
Spain 902 117 964 http://www.usr.com/emailsupport/es 9:00A.M.–5:00P.M.,M-F
Sweden +46 (0) 77 128 1020 emea_modemsupport@usr.com 8:00A.M.–5:00P.M.,M-F
Switzerland +0848 840 200 emea_modemsupport@usr.com 8:00A.M.–6:00P.M.,M-F
UK 0870 844 4546 http://www.usr.com/emailsupport/uk 8:45A.M.–5:45P.M.,M-F