Using your computer start the cmd program: Start => Run => cmd (for Windows Vista Start => Search => cmd). When a new window for this program appears type a command: ping sip.compass-inc.net -t. Then you will see the table similar to provided below (to stop the process press Ctrl + C buttons):
Reply from 22.214.171.124: bytes=32 time=11ms TTL=55
Reply from 126.96.36.199: bytes=32 time=13ms TTL=55
Reply from 188.8.131.52: bytes=32 time=12ms TTL=55
. . .
Ping statistics for 184.108.40.206:
Packets: Sent = 40, Received = 40, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 10ms, Maximum = 32ms, Average = 11ms
If the difference between the maximum and the minimum round trip times is comparatively small (e.g. minimum=10ms and maximum=32ms) it means you Internet connection is acceptable. Otherwise, you need to check whether you have any other applications launched on your computer that may cause some negative or even harmful effect on your Internet connectivity. Then, if you need, you may call to your current Internet provider to submit the request on checking your Internet quality.