Related to Code-1 or Level 1 Approval

Digital Signal Level 0 (DS-0) means the lowest-level signal in the time division multiplex digital hierarchy, and represents a voice-grade channel operating at either the 56 Kbps or 64 Kbps transmission bit rates. There are twenty-four (24) DS-0 channels in a DS-1.
Digital Signal Level 1 (DS-1) means the 1.544 Mbps first level signal in the time division multiplex hierarchy.
Barrier Level means the Barrier Level as specified in § 1 of the Product and Underlying Data.
Building level or district level leader means an individual employed by the District whose job assignment is that of a building level or district level administrator or an equivalent role, including an administrator licensed by the State Board of Education, an unlicensed administrator, or an individual on an Administrator Licensure Completion Plan. Building level or district level leader does not include the superintendent, deputy superintendents, associate superintendents, and assistant superintendents.
Digital Signal Level 0 or "DS0" means the 64 Kbps zero-level signal in the time-division multiplex hierarchy.

Code-1 or Level 1 Approval definition