An RJ-11 connectors are commonly used to connect a devices to phone lines. The Canopy system uses a utility cable with RJ-11 connectors between the AP or BH and synchronization pulse. The fourth pair is not used. Presuming CAT 5 cable and 6-pin RJ-11 connectors, the wiring of the cable for sync :

Pin 1 >> white / orange << Pin 1
Pin 2 >> white / green << Pin 2
Pin 3 >> white / blue << Pin 3
Pin 4 >> green << Pin 4
Pin 5 >> blue << Pin 5
Pin 6 >> orange << Pin 6