If you read the rules for using the repeater you are only supported to make one contact per a pass. Give everyone a chance to operate. TlO is always there along with John the Jammer.
Working the ISS has become a bit of a joke lately. Lots of high watt radios, with sat pack antennas walking on each other and drowning out the little guys. People whistling and tying up the repeater. Makes it hard to work with a 5 watt HT and a homemade yagi antenna. I would rather work SO50 or other quieter satellites.
I am just getting into the sat hobby and use HTs and homemade yagi and I fail to get through on the ISS. I can work Tevels pretty well but I have terrible desensing on all the others. I made a high pass filter for my 70cm and a LP filter for the 2m and it just barely helped. I still only hear static when I talk on SO-50 but people reply back with my full call-sign. I'm frustrated.
It's a CSN SAT device. Right below the monitor to the right of the yeasu controller and to the left of the microphone is a little black box with a green LCD panel. You log into that.