I generally deploy the 1231G cisco ap's along with two 5dbi cisco antennas [air-ant2506]. My predecessor used to purchase 6' antenna cables to go along with them.
I found this odd because the cabling tech would only mount the antennas about a foot and a half away from the AP and then COIL up the slack [isn't that defeating the purpose].
My thought is that you generally don't need to buy antenna cables unless you're having to mount the antennas a good distance away from the AP. But if the antennas are nearby, don't waste the money.
Am I right?