LDU 50
4TEL Line Test
The LDU provides comprehensive voice and DSL service assurance loop test capabilities. It provides demand and routine test capabilities for both reactive and proactive maintenance of the copper plant. The 4TEL II expert system utilizes the LDU’s ability to detect electronic ringers to accurately segment faults to the exchange/remote node, cable plant or customer premises. Field craft can use Tollgrade’s Voice Response System (VRS) to access the LDU capabilities for fast, convenient test results data.
| POTS/ISDN demand testing, including: |
- Fault isolation to dispatch segment (exchange/remote node, network, or customer), and Tested OK
- Cable length and balances
- Termination detection for network termination devices (e.g., NTE, electronic/mechanical bells)
- Hazardous voltage detection
- Electronic monitoring/busy detection
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| Extended tests: |
- Pull and break dial tone tests
- Pair ID
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| Routine test sequences: |
- DN/EN parametric batch testing
- DN/EN parametric routine testing
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| Enhanced Voice Testing Features: |
- Electronic ringer detection
- Enhanced receiver off-hook detection
- Integrated routine testing
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