This read-only value, in microseconds, reports the local system's transmit wake time as echoed back by the remote link partner, confirming what the remote device believes the local side is offering for EEE. An administrator compares this echoed value to the locally advertised transmit value to confirm the remote device correctly received and acknowledged the local device's EEE parameters. For example, a mismatch between this echo and the local device's actual advertised transmit value could indicate an LLDP synchronization issue between the two ends.