 
   const uint8_t firstByte = msg[0];
 
-#ifdef ENABLE_FS20_ENCODING_SUPPORT
   switch(firstByte)
     {
     default: // Reject unrecognised leading type byte.

  if(buflen < 8) { return(false); }
  const uint8_t t = buf[0];
  if((OTRadioLink::FTp2_CC1Alert != t) && (OTRadioLink::FTp2_CC1PollResponse != t)) { return(false); }
  buflen = 8; // Truncate message to correct size for efficiency.
  return(true); // Accept message.
  }
#endif

      }
#endif // ALLOW_CC1_SUPPORT_RELAY
    }

  // Unparseable frame: drop it; possibly log it as an error.
#if 1 && defined(DEBUG) && !defined(ENABLE_TRIMMED_MEMORY)
  p->print(F("!RX bad msg, len+prefix: ")); OTRadioLink::printRXMsg(p, msg-1, min(msglen+1, 8));
#endif
  return;
