Tier 1 Help Desk means Customer's point of contact(s) to provide all Tier 1 Support within Customer's organization(s).
Tier 1 Support means the Technical Support provided by the Tier 1 Help Desk.
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.
Tier 2 Support means the Esri Technical Support provided to the Tier 1 Help Desk when a Case cannot be resolved through Tier 1 Support.
Digital Signal Level 1 (DS-1 means the 1.544 Mbps first level signal in the time division multiplex hierarchy.
Enhanced 9-1-1 service or "E-911" means a service consisting of telephone network features and
Tier 2 means the portion of the design- related information contained in the generic DCD that is approved but not certified by this appendix (Tier 2 information). Compli- ance with Tier 2 is required, but generic changes to and plant-specific departures from Tier 2 are governed by Section VIII of this appendix. Compliance with Tier 2 pro- vides a sufficient, but not the only accept- able, method for complying with Tier 1. Compliance methods differing from Tier 2 must satisfy the change process in Section VIII of this appendix. Regardless of these dif- ferences, an applicant or licensee must meet the requirement in Section III.B of this ap- pendix to reference Tier 2 when referencing Tier 1. Tier 2 information includes:
Digital Signal Level 3 (DS-3 means the 44.736 Mbps third level signal in the time division multiplex hierarchy.
Signaling System 7 (SS7 means a signaling protocol used by the CCS Network.
Digital Signal Level 0 or "DS0" means the 64 Kbps zero-level signal in the time-division multiplex hierarchy.
System Life means all phases of the system's development, production, or support.
Provider network means an affiliated group of varied health care providers that is established to provide a continuum of health care services to individuals;
Digital Signal Level 3 or "DS3" means the 44.736 Mbps third-level in the time-division multiplex hierarchy. In the time-division multiplexing hierarchy of the telephone network, DS3 is defined as the third level of multiplexing.
Keyboard access Can users access all functions and content, and complete all tasks, independently by using only the keyboard (<tab>, <enter>, <spacebar>, <esc>, and arrow keys)? Verify in particular: o There are no keyboard traps that would prevent a user from advancing through the entire page, such as an automatically-refreshing social media embedded feed (tip: try to tab very, very slowly through any such feed to observe whether a user can close it, or move past it, at a reasonable point; if the feed keeps refreshing by automatically adding additional entries to be shown, it causes a trap for those who are unable to use quick keyboard strokes – or a mouse - to navigate);
Small municipal separate storm sewer system or "small MS4" means all separate storm sewers that are (i) owned or operated by the United States, a state, city, town, borough, county, parish, district, association, or other public body (created by or pursuant to state law) having jurisdiction over disposal of sewage, industrial wastes, stormwater, or other wastes, including special districts under state law such as a sewer district, flood control district or drainage district, or similar entity, or an Indian tribe or an authorized Indian tribal organization, or a designated and approved management agency under § 208 of the CWA that discharges to surface waters and (ii) not defined as "large" or "medium" municipal separate storm sewer systems or designated under 4VAC50-60-380 A 1. This term includes systems similar to separate storm sewer systems in municipalities, such as systems at military bases, large hospital or prison complexes, and highway and other thoroughfares. The term does not include separate storm sewers in very discrete areas, such as individual buildings.