Dying gasp
A dying gasp is a message sent by the customer premises equipment to equipment managed by an internet service provider to indicate that the CPE has lost power. Also known as last gasp.
DSL
A DSL device will send a dying gasp signal to the digital subscriber line access multiplexer when a power outage occurs. A DSL interface with dying gasp must derive power for a brief period from another source so that the message can be sent without external power. The dying gasp message will end the session and a new session will be able to be made as soon as power returns and the modem retrains.Dying gasp is referenced in section 7.1.2.5.3 of ITU-T Recommendation G.991.2 as the Power Status bit.