cas - Computer Definition
- Centralized Attendant Service. A PBX feature that allows the consolidation of multiple console operators for a number of PBXs.Thereby, a single group of operators can perform all attendant functions, including placing calls, answering and extending calls, and establishing conference calls. CAS will work whether the PBXs are distributed across a campus, a metropolitan area, or even a wide area, as long as the PBXs are networked over dedicated circuits.
- Channel-Associated Signaling. A signaling and control technique by which the signaling and control information associated with a communications channel is carried within the channel, itself, or in a separate channel permanently associated with that communications channel. See also CCS, NFAS, and signaling and control.
(1) (Channel Associated Signaling) Carrying signaling information within the data channels of a T1 line (in band) rather than on a separate control channel. CAS signaling is also used to carry 911 emergency data such as telephone number and location information. Contrast with CCS.
(2) (Column Address Strobe) A clock signal in a memory chip used to pinpoint the column of a particular bit in a row-column matrix. See RAS.
(3) (Content Addressed Storage) A storage technique from EMC that assigns an identifier to fixed content. See content addressed storage.
(4) (Communications Application Specification) A programming interface from Intel and DCA for activating functions in fax/modems. Introduced in 1988, Intel provides both the boards and the chips. CAS has not been widely used.