For me this is very strange but i guess you learn something new everyday !! We installed some IP/dial-up Credit Card machines at one of our locations over night. In the morning i noticed our network was moving super slow, there were delays connecting to the main server and as soon as i unplugged the Cat5 from the CC machines, network went back to normal ! Has anyone every experienced this or able say what would cause this.
PS. It doesn't seem to be an ip conflict as i have checked the IP availability plus did both DHCP and Static setup.