RTS/CTS (Request To Send / Clear To Send) helps prevent problems when wireless clients can receive signals from more than one wireless access point on the same channel. The problem is sometimes known as hidden node.
We do not recommend that you change the default RTS threshold. When the RTS Threshold is set to the default of 2346, RTS/CTS is disabled.
If you must change the RTS threshold, adjust it incrementally. Lower it a small amount at a time. After each change, allow enough time to decide whether the change in network performance is positive before you change it again. If you lower this value too much, you can introduce more latency into the network, as Requests to Send are increased so much that the shared medium is reserved more often than necessary.