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Strengths: high level of power protection (3996 joules), complete data-line protection (coax/RJ11/RJ45), well designed, easy to use, Belkin $300,000 equipment protection warranty
Weaknesses: 1 of 5 units ordered was defective and returned for replacement
Summary: I purchased 5 of the Belkin surge protectors for college dorm and home based computers. The main attraction of this surge protector was a high level of power protection (3996 joules) combined with complete data-line protection (coax/RJ11/RJ45 (Ethernet)) at a very competitive price. Belkin claims that this unit meets the recommended UL 1449 (power surge protection), UL 1363 (power cord) and UL 1283 (EMI/RFI filter) standards, but they do not mention meeting the UL 497 standard (surge protection for telephone lines (RJ11) and network lines (RJ45)). You may want to consider the Tripp-Lite TLP810NET at a higher price if full certification to UL standards is important to you.
The Belkin surge suppressor is well designed and easy to use. Belkin provides a $300,000 warranty to replace equipment that was damaged by an electrical surge when that equipment was properly connected to their surge protector.
After receiving the five units, I did a quality check for each one by connecting it to a computer with telephone (RJ11) and network connections (RJ45). I did not check the coax connection and, obviously, I did not check the surge suppression capability of these units. I was particularly concerned about any degradation of network speed when connected through the surge protector, so I performed a broadband test of upload/download speed using speedtest.net after making the network connection. I found that 4 of 5 surge protectors passed my quality check, but 1 of the 5 surge protectors had a defective RJ45 connection and was returned for replacement. I also found that the broadband speed was not affected when connected through the network connection (RJ45) of the 4 surge protectors that passed my quality check.
Once you get passed the hassle of possibly receiving a defective unit, the Belkin surge suppressor appears to be a good value.

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