In order for the CASAMBI network to be easy to use, all actors on the site must "see" each other. In order for this to succeed, we usually need a few repeaters which pick up the signal and pass it on to the next actuator. 
If only a small signal is needed to complete the network, there is the repeater without an external antenna. These can either be built into a junction box or mounted with a separate housing outside the shaft. 
If the distances are longer, we have repeaters with a deported antenna. These are available in 1m, 3m, 5m, 10m, 15m and 20m and allow connection to any actuator on site.