What is meant by Mapping Handsets
Each receiver has a unique ID as shown on the receiver ID label. All handsets are locked into
communicating with a receiver. If you want to lock a handset to work with a different/new
receiver you must press and hold down the “?” key until the handset has mapped. This can take
several seconds. When you see the up/down arrows flashing on the handset LCD, the handset
is locked to the new receiver. Please note that when locking handsets the distance between
handset and receiver should be a approx 50-75mm.