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As one of the key technologies involved in communication networks, all-optical switching has witnessed many research efforts during the last decade. This work presents a detailed investigation of the properties and attractive interaction of spatial solitons in nematic liquid crystals for all-optical switching devices. This includes a description of basic properties such as their multimode behavior, as well as their power dependent interactions and signal steering. Furthermore, the temporal performance of an all-optical switching setup is analyzed and discussed. Thanks to their long-range, phase and wavelength independent interactions at milliwatts powers, and despite their slow response time in switching applications, nematicons proved to be an extremely promising testbed for soliton-based devices, including signal waveguides and power-dependent spatial steering devices.