Tony,
I connected to it from node 2010 and it has excellent sounding audio! It was very busy when I connected so I didn't stay connected very long.
If someone is talking on the Echolink side does our audio mix with theirs or are we locked out? I'm not sure of thelinkbox is a mixing or one-at-a-time echolink reflector. In app_rpt everything is mixing, but typically echolink is one-at-a-time.
I'll answer for Tony since he's asleep. Yes thelinkbox mixes active audio sources. It treats all VoIP endpoints as separate streams, mixes the active audio and then sends the audio out. If the output is a radio port then that's it. If the output is another VoIP stream then the audio is encoded using the appropriate codec (currently GSM, ADPCM or uLaw) before being sent back out. Thelinkbox also has packet layer conferencing since it's an extension to thebridge. Thebridge and the linkbox can repack GSM data between Asterisk, EchoLink and IRLP connections so there's no need to decode and then re-encode. Clearly that capability doesn't provide connectivity between GSM Asterisk and ADPCM IRLP. Since Tony is currently using thebridge not thelinkbox there's no mixing at the moment. 73's Skip WB6YMH