A period of not more than 72 consecutive hours (the aggregate of which do not exceed 15 days per year) during which emergency calls and services are expedited by emergency response teams. [After T1.304-1989]

Emergency Telecommunications Service (ETS) is a national service, providing priority telecommunications to the ETS-authorized user in times of disaster and emergency (ITU-T Study Group 2) [ITU-T E.107].

The E-CSCF receives the emergency session establishment request from a P-CSCF (in an IMS originating network) or the I-CSCF in an IMS-based NG9-1-1 Emergency Services Network), queries the LRF for routing information, and forwards the call request toward the appropriate PSAP or other emergency services network per the routing information.

1. electromagnetic interference,
2. Exchange Message Interface.

1. Electromagnetic energy propagated from a source by radiation or conduction.
Note: The emission may be either desired or undesired and may occur anywhere in the electromagnetic spectrum.
2. Radiation produced, or the production of radiation, by a radio transmitting station. For example, the energy radiated by the local oscillator of a radio receiver would not be an emission but… (Read More →)

The selective and controlled use of electromagnetic, acoustic, or other emitters to optimize command and control capabilities while minimizing, for operations security (OPSEC): (a) detection by enemy sensors; (b) to minimize mutual interference among friendly systems; and/or (c) to execute a military deception plan. [After JP1]

Protection resulting from measures taken to deny unauthorized persons information derived from intercept and analysis of compromising emanations from crypto-equipment or an information system (IS). [INFOSEC-99] Synonym [in INFOSEC] emissions security.

Of a radio emission, the distribution of power or energy as a function of frequency.

See emission security.

The ratio of power radiated by a substance to the power radiated by a blackbody at the same temperature.