Extended Life Device (ELD)

Hardware that supports extended last gasp. Currently, only secure electricity meters support Extended Last Gasp. ELDs differ from other electricity meters in the following ways:

• ELDs wait 300 ms before sending the Last Gasp. This allows non-ELDs time to transmit first.

• ELDs provide up to 16 seconds of power in which the NIC can send a Last Gasp. Non-ELD devices have up to 300 ms.

• ELDs bundle Last Gasps received from other devices exactly like battery backed devices, but only for the 16 seconds of their extended power.

• ELD bundling can be turned off, in which case the ELD sends its own and forwards individual Last Gasps.

• Exception polling is not performed on ELD devices.