Hi Greg, A server sends beacons on port 26 and that is also where aprs messages from clients are sent. When your server receives a frame on port 26, like here: <US><SOH>00uSM0RWO:26 !5901.16NP01756.10E&89D1<EOT> It checks if the frame comes from a known server, a server it has heard before. If it originates from a known server then it does not send a QSL. If it comes from a callsign that is not in the list of known servers then it sends a QSL. So, as soon as your server hears something from that server that puts it in the list of known servers then it should stop sending QSL's. 73 de Per, sm0rwo fre 2011-12-30 klockan 08:43 -0500 skrev Greg: > Is it expected that my server would send qsl to others servers after > their beacon? I notice this server sends qsl but others don't send qsl > back to mine even when it was heard. Just wondering where to change if > necessary. > > Greg >