Overview | 150-409-115-05, Issue 5 |
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APPLICATIONS
HiGain doublers operate with any number of T1, Plain Old Telephone Service (POTS), Digital Data Service (DDS), or other HiGain systems sharing the same cable binder group.
The EDU-409 List 1 has a range of up to 35 dB loss at 260 kHz on each of the four HDSL loops. A list of HDSL signal cable losses for various cable gauges at 260 kHz and 135 Ω is provided in Table 1. The table is applicable to HDSL cable pairs running between the ELU and the EDU-409 List 1 and between the EDU-409 List 1 and another EDU or ERU.
Table 1. HDSL Signal Cable Loss
| Cable Gauge | Loss @ 260 kHz | Ω per km |
| (dB/km)(a) |
| | |
| | | |
| 0.4 mm/26 AWG | 13.94 | 272 |
| 0.51 mm/24 AWG | 10.47 | 171 |
| 0.61 mm/22 AWG | 8.14 | 105 |
| 0.91 mm/19 AWG | 5.74 | 52 |
| | | |
(a) Add 3 dB for each bridged tap and 1 dB for each cable gauge change.
The EDU-409 List 1 can be used in two-span to four-span circuits, depending on the models of the ELU and ERU being used with the doubler units and the power option chosen for the ERU. The number of doublers is equal to one less than the number of Spans (as shown in Figure 3 on page 10).
2 | January 26, 2000 | EDU-409 List 1 |