This read-only value, in microseconds, reports the transmit wake time the remote link partner has advertised as its own hardware capability for EEE, as learned via LLDP from that device. An administrator uses this to see the remote device's raw EEE capability independent of anything the local device is doing. For example, if a newly connected device's advertised transmit wake time here is unusually high, the admin might expect a correspondingly longer resolved wake time on that link compared to other, more EEE-efficient devices.