dc310701_c2
C2.7 Additional Responsibilities of TCF/PTFs. In addition to the normal functions and responsibilities, level 4 and 5 facilities may be designated control offices for the activation, change, or deactivation of DII trunks and circuits, and have primary responsibility for establishing and maintaining the end-to-end alignment and quality of assigned DII trunks and circuits. These control activities focus on local equipment capabilities and user interface with the DII. The three types of control offices are: Communications Control Office (CCO), Intermediate Control Office (ICO), and Communications Management Office (CMO). A CCO or CMO must be assigned to every DISN trunk and circuit by the DISA Allocation and Engineering activity, and must be included in the Telecommunications Service Order (TSO). The CCO or CMO has primary responsibility for ensuring that transmission facilities provide maximum quality service to users of the DII. This requires testing and monitoring of parameters, threshold violations, alarm status, error rates, and other such indicators of transmission media performance. C2.7.1
Communications Control Office (CCO).
C2.7.1.1 General. A CCO exercises direct technical supervision over assigned DII trunks and circuits. A CCO must have the capability to test and monitor the trunk or circuit, ascertain that the trunk or circuit meets specified technical parameters, direct necessary adjustments, assess operational status, and perform other such functions required to establish and maintain high quality, user-touser communications. These capabilities may be either manual or automated. All other facilities that the trunk or circuit traverses must respond to the technical direction of the CCO. The CCO is responsible for initially activating the trunk or circuit, accepting leased service on behalf of the U.S. Government, and submitting appropriate completion reports required by the TSO issuing authority. The CCO is responsible for coordinating all realignment when necessary to maintain the end-to-end engineered values stated in the TSO. CCO assignments must be made in accordance with the following guidelines: C2.7.1.1.1 When a trunk or circuit traverses a DII TCF/PTF, a DII TCF/PTF must be assigned as the CCO. C2.7.1.1.2
When a trunk or circuit does not traverse a DII TCF/PTF,
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