Installation And Test; Unpacking; Selecting Hdsl Lines - ADC FCS-717 2B Technical Practice

Installation and Test

I
NSTALLATION AND
This section provides procedures for unpacking, HDSL pre-provisioning, mounting, and wiring for the
FCS-717 List 2B COT shelf.

Unpacking

Upon receipt of the equipment:
1 Unpack each container and visually inspect it for signs of damage. If the equipment has been damaged in
transit, immediately report the extent of damage to the transportation company and to ADC. Order
replacement equipment if necessary.
2 Check the contents against the packing list to ensure complete and accurate shipment. If the shipment is short
or irregular, contact ADC as described in
prolonged period, store the equipment in its original container.

Selecting HDSL Lines

HDSL transmission uses two copper pairs connected between the FCS-717 List 2B COT shelf and RT enclosure.
The wire pairs should have identical electrical make-ups. Differences in total wire length, wire gauge, bridge taps,
and exposure to crosstalk should be kept to a minimum. Pair isolation, (Tip-Ring, Tip-Ground, and Ring-Ground)
must be ≥ 100k Ω.
The wire pairs from the FCS-717 List 2B COT shelf to the RT enclosure must meet the following guidelines:
• nonloaded cable only
•
multigauge is restricted to two gauge changes, except for stubbing or fusing
•
total bridge taps may not exceed 2.5 kft. No single bridge tap may exceed 2.0 kft
The distance limitation for HDSL transmission is based on a maximum signal attenuation of 35 dB. Since signal
attenuation decreases as cable size increases, the larger the gauge (19 AWG vs. 26 AWG), the greater the distance
between the FCS-717 List 2B COT shelf and the RT enclosure.
temperature of 68°F).
10
T
EST
"Acronyms" on page
Table 11. 24 Channel HDSL Transmission Distances
Gauge Loop Length
19 AWG 22.8 kft
0.9 mm 7.0 km
22 AWG 16.1 kft
0.6 mm 4.9 km
24 AWG 12.3 kft
0.5 mm 3.7 km
26 AWG 9.0 kft
0.4 mm 2.7 km
January 6, 2003
29. If you must store the equipment for a
Table 11 identifies these distances (at a cable
Resistance
367 Ω
521 Ω
638 Ω
750 Ω
SCP-FCS717-022-03H
FCS-717 List 2B