I have a 135m ethernet CAT 5E cable running down to my garage into my desktop. The speed is fine but about 5 times a day the connection will drop for about 5 seconds and come straight back. I'm not sure if it is a cable problem because apart from the cutting out it works perfectly fine. It could be a problem with my desktop but it has had no problems like this before. Replacing the cable will be quite a hassle so other suggestions would be appreciated.