i understand now how it works,the channel.xml link the service ref to the channel id but sul isnt compatible with the estiptv epg.
sul gives me :
<channel id="ABC US">1:0:1:8e3f:d0ab:3515:0:0:0:0:http%3a//example.m3u8</channel> <!-- ABC HD US -->
estiptv us epg say:
<channel id="ABC East US">...