Product Overview
150-319-205-05, Issue 5
2
January 26, 2000
ELU-319 List 5E and List 6E
A
PPLICATIONS
HiGain systems provide a cost-effective, easy-to-deploy method for delivering G.703 E1 High Capacity Digital
Service (HCDS) over metallic pairs.
•
The service is deployed over two unconditioned, non-loaded copper pairs, yet it demonstrates a quality that
is competitive with fiber optics.
•
Conventional, in-line, E1 repeaters are not required.
•
Cable pair conditioning, pair separation and bridged tap removal are not required.
Each loop has no more than 35 dB of loss at 260 kHz, with driving and terminating impedances of 135
W
.
Table 1
provides a “loss” guide for the various cable gauges at 260 kHz and 135
W
.
Table 1
applies to the HDSL
cable pairs between the ELU, ERU, and EDU modules. In the absence of specific insertion loss measurement data,
add 3 dB for each bridged tap and 1 dB for each cable gauge change.
The E1 operating ranges on unimpaired cable pairs are shown in
Table 2
as a function of cable gauge and
average margin.
In general, HiGain systems:
•
Operate with any number of other E1, POTS, Digital Data Service (DDS) or other HiGain systems sharing
the same cable binder group.
•
Can be used with customers requiring G.703 service on a temporary or permanent basis.
•
Provide a means of quickly deploying service in advance of fiber-optic transmission systems.
With a HiGain system, service can be provided within hours. Fiber-optic systems can be installed incrementally
and cut-over from the installed HiGain system when convenient to do so.
Table 1.
HDSL Loss Over Cables
Cable Gauge (AWG/mm)
Loop Loss at 260 kHz
(dB/km)
Loop Resistance
(
W
per km)
26/0.4 mm
13.94
272
24/0.51 mm
10.47
171
22/0.61 mm
8.14
105
19/0.91 mm
5.74
52
Table 2.
E1 Ranges (km) on Unimpaired Cables vs. Average Margin (M) in dB
Cable Gauge (mm/AWG)
M = 11
M = 7
M = 3
0.4 mm/26 AWG
2.7 km
3.0 km
3.3 km
0.51 mm/24 AWG
3.6 km
4.5 km
4.4 km
0.61 mm/22 AWG
4.7 km
5.2 km
5.7 km
0.91 mm/19 AWG
6.6 km
7.3 km
8.0 km
