- Industry: Telecommunications
- Number of terms: 29235
- Number of blossaries: 0
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ATIS is the leading technical planning and standards development organization committed to the rapid development of global, market-driven standards for the information, entertainment and communications industry.
A signal transmitted in the outgoing direction when a terminal determines that it has lost the incoming signal. RAI is commonly called the yellow alarm signal. For superframe (SF) operation, an RAI is transmitted by setting the bit-2 position of every channel time slot to zero. For extended superframe (ESF) operation, an RAI is transmitted by introducing a priority message codeword 1 1 1 1 1 1 1 1 00000000 (LtR) in the ESF datalink.
Industry:Telecommunications
A signal transmitted in the outgoing direction when a terminal determines that specific defects have persisted long enough to declare a received signal failure. The RFI terminology is used with SONET in this standard to promote a more descriptive and consistent terminology.
Industry:Telecommunications
A signal unit (or sequence of bits) that (by changing its status) is used to request retransmission by the remote end whenever it receives a signal unit that is out of sequence.
Industry:Telecommunications
A signal unit that contains service information and signaling information fields and is retransmitted by the signaling link control if it is received in error. The value of length indicator is always greater than 2.
Industry:Telecommunications
A signal unit that contains status information about the signaling link in which it is transmitted.
Industry:Telecommunications
A signal unit that is transmitted when there are no message signal units or link status signal units to be transmitted. It contains only error control and delimitation information.
Industry:Telecommunications
A signal used by the network to indicate the presence of an incoming call. It consists of a ringing signal periodically interrupted by silent (no ringing signal) intervals.
Industry:Telecommunications
A signal used to command the far-end receiver to loop back the received payload.
Industry:Telecommunications
A signal used to command the far-end receiver to loopback the received line signal. Synonym line loopback signal.
Industry:Telecommunications
A signal, sent in the backward direction, to indicate that a call cannot be completed because the called line is not in a ready condition, but is under control, as opposed to not being in a ready condition and not under control.
Industry:Telecommunications
