At Fraunhofer-IOF is available 75km pair of dark fibers between cities Jena and Erfurt for testing. Specification of the link: ~20dB of loss, SSMF, 6km is hanged fiber (measurement can be influenced by weather conditions). Established 4Gb/s classical communications. Possibility of the usage in-house built prototypes and services: - post-processing based on BBM92 and BB84 protocols available for QKD demos, - EPS and FPS quantum sources, - SSNPD and SPAD detectors, - advanced polarization controllers, - time taggers, - measurement equipment: OSAs, Oscilloscopes, AWGs, filters, WDMs, - PAMs, - set of interferometers, ... *Possibility of connection to free-space link and optical ground station for satellite quantum communication at LEO.