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AS: Channel Associated Signaling Channel Associated Signaling (CAS), one of two types of telecom signaling technologies, is the transmission of signaling information within the information band, or in-band signaling. This means that voice signals travel on the same circuits as line status, address, and alerting signals. As there are twenty-four DS0 channels on a full T1 line, CAS interleaves signaling packets within voice packets. Various types of CAS signaling are available in the T1 world. The most common forms of CAS signaling are loopstart, groundstart, and E&M signaling. The biggest disadvantage of CAS signaling is that the network uses bits from information IP packets, such as voice packets, to perform signaling functions. CAS signaling is often referred to as robbed-bit signaling. The other type of signaling is the common channel signaling (CCS), which is an out of band signaling technology. SS7/C7 and ISDN are based on the CCS.
AS: Channel Associated Signaling
Channel Associated Signaling (CAS), one of two types of telecom
signaling technologies, is the transmission of signaling information within the
information band, or in-band signaling. This means that voice signals travel on
the same circuits as line status, address, and alerting signals. As there are
twenty-four DS0 channels on a full T1 line, CAS interleaves signaling packets
within voice packets. Various types of CAS signaling are available in the T1
world. The most common forms of CAS signaling are loopstart, groundstart, and
E&M signaling. The biggest disadvantage of CAS signaling is that the
network uses bits from information IP packets, such as voice packets, to
perform signaling functions. CAS signaling is often referred to as robbed-bit
signaling. The other type of signaling is the common channel signaling (CCS),
which is an out of band signaling technology. SS7/C7 and ISDN are based on the
CCS.
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