O que (quem) é in-band signalling - definição
SENDING CONTROL FLOW INFORMATION IN THE SAME CHANNEL AS DATA
In-band signalling; In-band; Inband
in-band signalling
<communications> (Or CAS, channel associated signaling)
Transmission of control signals in the same channel as data.
This is commonly used in the {Public Switched Telephone
Network} where the same pair of wires carry both voice and
control signals (e.g. dialling, ringing). Another example is
the use on a computer serial line of Control-S and Control-Q
characters for flow control as opposed to {hardware flow
control} which would be out-of-band signalling.
In digital communications, in-band signalling often uses
"bit-robbing" where, for example, one bit in each frame is
used for signalling instead of data. This is the reason why a
D1 channel in the T-carrier system can only carry 56 Kbps of
usable data instead of the 64 Kbps carried by the D0 channel
in the E-carrier system.
(2007-01-26)
in-band signaling
Amplitude modulation signalling system
BROADCAST TECHNOLOGY
AM Signalling System; Amplitude Modulation Signalling System
The amplitude modulation signalling system (AMSS or the AM signalling system) is a digital system for adding low bit rate information to an analogue amplitude modulated broadcast signal in the same manner as the Radio Data System (RDS) for frequency modulated (FM) broadcast signals.
Wikipédia
In-band signaling
In telecommunications, in-band signaling is the sending of control information within the same band or channel used for data such as voice or video. This is in contrast to out-of-band signaling which is sent over a different channel, or even over a separate network. In-band signals may often be heard by telephony participants, while out-of-band signals are inaccessible to the user. The term is also used more generally, for example of computer data files that include both literal data, and metadata and/or instructions for how to process the literal data.
