Summary of unexpected Wavelength Tracker keys detected on the WTOCM type card port. The unexpected key info is reported in string format with the following organization: First channel in ITU channel number format. First channel first key number being detected. First channel next key number being detected (if any). ... and so on for remaining keys being detected. Delimiting sequence of 0000. Second channel in ITU channel number format. Second channel first key number being detected. First channel next key number being detected (if any). ... and so on for remaining keys being detected. Delimiting sequence of 0000. Second channel power value in signed mBm format. ... and so on for the remaining channels detecting unexpected keys. Terminating sequence indicating no further channels. Key values are hex values of N+10000, where N is the actual key value (in decimal). If there are no channels with unexpected keys, only the terminating sequence is returned.