While the American segment of the ISS has data published on-line (http://spacestationlive.nasa.gov), the same cannot be said about the Russian segment.
It is known that telemetry is transmitted to the Earth on 128 kHz-wide PCM (Pulse-code modulated) FM (Frequency modulated) channels at 628, 630, 632, 634, 922, 928 MHz (source: http://www.ea1uro.com/megasat.html).
How could one receive, demodulate, and decode the telemetry?
Is Russian ISS telemetry encrypted?
Are there any high-frequency data items in the frames (transmitted more often than once a second - 1 Hz).
Historical reference: Sven Grahn's Space Radio page.