The ISS currently operates a packet system from the Columbus module on 437.55 in addition to the 145.825 system in the service module. Both have a packet digi (alias of ARISS) and mailbox. They basically operate the same just on different frequencies.
Kenneth - N5VHO
Submitted by N5VHO on Fri, 2012-02-24 18:24 @ ISS FAN CLUB