C2MS12 — Command Echo Not Provided Message

We have already added a CMD-ECHO boolean to the Command Request Message in C2MS11-87. However, there is a possible scenario where just because we asked for one, there is no way for one to be delivered.

According to C2MS11-87, the field is an attempt to "Indicate if an ECHO should be sent at any configured point(s) along the ground chain as the command is transmitted."

The question of this issue is around what to do if the back-end system is not capable of or is not configured to send an Echo. In that case, there would quietly be no echo at all in spite of setting that flag to true. Gerry has brought up that perhaps we need a message type that is "unable to echo" or use the CMD ECHO message with a value of "here's your echo, but we aren't able to collect any information".