@BC
The ME-U and ME units get channel names from the console they’re connected to.
The SQ will not be receiving channel names from the Avantis, as only audio is sent/received over a system to system connection (although tie lines act like a pass through, you’re still taking inputs and routing them directly to outputs through the core).
Therefore, the ME-U and ME units can only be sent the name of whatever is being sent from the SQ and as you are using tie lines, these will not be channel names but input socket labels.
Because you have a ME-U however, you can log in over the network and manually set channel names along with stereo status for all the ME units it’s sending to.
Thanks,
Keith.