Teď jsem kouknul na web k MaxIm DL: http://www.cyanogen.com/help/maximdl/Sending_Commands_to_the_Telescope.htm
a tam se píše:
Guider Relays or Main Relays
Some CCD cameras include a built-in port that can be connected directly to a telescope mount, using an RJ-11 (telephone cable) connector. Cameras supporting this feature include all SBIG models, current-model Starlight Xpress cameras, and some special-purpose autoguider cameras such as the Orion StarShoot Autoguider. Normally Control Via is set to Guider Relays, but if you happen to have a main camera with an autoguider port, you can use it instead by selecting Main Relays.
Takže v téhle konfiguraci by to mělo fungovat. A taky asi funguje.