frequencies in use
the following frequencies are currently used for ariss general qso's
*voice and packet downlink: 145.80 (worldwide)
voice uplink: 144.49 for regions 2 and 3 (the americas, and the pacific)
voice uplink: 145.20 for region 1 (europe, central asia and africa)
packet uplink: 145.99 (worldwide)
crossband fm repeater downlink: 145.80 mhz (worldwide)
crossband fm repeater uplink: 437.80 mhz (worldwide)
worldwide sstv downlink: 145.800 mhz
packet downlink：145.825 mhz
