Since this has come up a couple of times it looks like some clarification is in order.
CMR/CMX listed cable is not necessarily intended for outdoor use or resistant to sunlight.
CMR is communications riser and CMX is communications limited use within dwelings. The "X" does NOT mean exterior or outdoor.
A listed cable for use outdoors may say "outdoor" on it but usually it's only described for such use in the manufacturers literature. The CMR/CMX printed on it means nothing in this respect.
There is no UL or NEC requirement that any LV communications cable be specifically listed for outdoor use nor is any LV communications cable prohibited from being used outdoors.
-Hal
