I have a client who is having experiencing very slow Internet connection recently. There is a ISP router pre-configured which is Cisco 800 series (no wireless) and this router connects to the Internet (ADSL2+). In the past, I setup a Cisco RV120 wireless (http://www.cisco.com/c/en/us/products/routers/rv120w-wireless-n-vpn-firewall/index.html
) with firewall feature enabled and connect to the ISP router.
The ISP router connects to wall socket without a filter and there is a telephone in another room and I put a filter in the line. The ISP ran a speed test between their exchange and MDF in the building. The speed result was:
= 789300 (7.8mbps)
ed = 10721300 (10.7mbps)
This means there is not problem in their line so it should be the line between MDF and my client's flat. On the ISP router, the speed result was:
Speed (kbps): Down- 4537 Up - 791
How would you troubleshoot this issue so the connect can be back to normal?