2. DSL circuit frequency interference. If its a DSL circuit, interference from other circuits in the telephone companys cable bundle can cause packet loss, latency and outages. T1 circuits are prone for causing problems. T1 circuits installed in neighbors offices can interfere with DSL.
6. Congested ISP. ISPs frequently become congested during heavy traffic and sometimes during normal traffic use. Congestion can also happen between routers in their network and are especially prevalent in meet points between two ISPs. Detecting ISP congestion requires monitoring the Internet circuit with an ISP Packet Loss and Delay Test Tool. If the problem is intermittent, then the tool must monitor over an extended period of time such as several days or even a week.
1. Faulty electrical connection near Internet modem/router. Faulty electrical connections can be caused by bad cabling and loose connections. If its a cable modem, the modem must be attached to the first cable split and preferably the connection with the greatest signal level. If its a DSL circuit, no other cables should attach to the circuit between the telephone company box and the DSL splitter.
3. Interference from WiFi radio in Internet Modem/Router. Some Internet companies supply modems and routers with built-in WiFi access point capabilities. The built-in access point can be convenient, but it can play havoc with the modem/router itself. WiFi operates in the 2.4 Ghz frequency range. That is the same for many cordless phones and microwaves. Using any 2.4 Ghz device in close proximity to the WiFi enabled modem/router can overload the receive side of a WiFi radio and could cause many problems including device resets. This is true even if the WiFi is not being used as long as the radio is turned on. Make sure the WiFi radio is turned off in software programming for any Internet modem/router. If WiFi is needed, install a stand alone access point.
Here are the most frequent causes of a slow Internet connections:
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