There are three types of case for your RS Integrator modules: the rackmountable RS10 and RS15, plus the freestanding RS8000. Whichever combination of these you choose, your access to the modules themselves will always be via the inputs and outputs on their front panels. In most situations this is ideal, but there may be occasions when you would like to make permanent or semi-permanent connections without trailing long cables across the front of the Integrator. The RS250 Trunk Line is the means by which you accomplish this.
If you wish to connect CV inputs, Triggers and Gates to the rear of your Integrator, Analogue Systems will add ten sockets to the rear panel of your RS15, RS10 or RS8000, and install a wiring loom that connects them to an RS250 installed in the front panel of your synthesiser. This is a particularly convenient way to make semi-permanent connections to other devices, especially when the Integrator is installed in a closed rack. It also allows you to connect your Integrator's audio outputs to a rackmount patchbay, effects units, or mixer without the clutter of trailing cables.