I think most repeaters that have Echolink can have more than one person connected by Echolink. I know the repeaters I have used while checking into nets have had 4-5 people at a time logged in and if we wanted, all of us could talk to each other if we wanted. Echolink also affords the ability to go direct with others on Echolink without going through a repeater. I have done it in the past many times. I believe you can only do one person at a time though if you go direct on Echolink.