You can tell the difference by simply placing one of these Klein Tools RJ11s next to a competitor's newly purchased RJ11. Install new connectors on the 25 foot 4-wire telecom cable. Because both the quality of the modular connectors and the accuracy of the crimping are critical factors in the throughput provided by the cable, the connectors at each end of the cable were replaced. The result is improved compared to the original cables and connectors. The cable was for VOIP (from an ISP's 1Gbps fiber optic line), a phone line with two numbers for voice and fax. The additional price was about 19 cents per fork. Breakeven is clearly usage and time dependent. By the way, we used ratchet pliers as recommended.
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