Many portable personal computers use
Menus
For abbreviations used in the screen diagrams, see Table 2.
The screens illustrated in Figure 6 through Figure 18 are for an HDSL circuit deployed with ADTRAN’s Low Voltage HDSL technology. The circuit includes an LTU, NTU, and two REG. This scenario was chosen for inclusiveness of functionality. However, other configurations are possible, such as one REGs, and the display will vary slightly from those shown in this section.
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| Table 2. Screen Abbreviations |
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Abbreviation |
| Definition |
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ES |
| Errored Seconds |
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SES |
| Severely Errored Seconds |
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UAS |
| Unavailable Seconds |
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FRAMING | CCS | Common Channel Signaling |
| CAS | Channel Associated Signaling |
| Unframed | Unframed E1 Operation |
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CODE | HDB3 | High Density Bipolar Order 3 |
| AMI | Alternate Mark Inversion |
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CRC4 |
| Cyclic Redundancy Check 4 error detection |
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CFM |
| Core Frame Mapping (Method 0, Method 1) |
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BPV |
| Bipolar Violation |
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S/N |
| Serial Number |
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15M |
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24H |
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Alarms |
| Lists current alarm condition status |
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0 |
| Poor signal quality: Noise margin is |
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| (3 |
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| Margin measurement above | |
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9 |
| Excellent signal quality: Margin is 9 dB above |
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6 | Section |