HDSL 3192 HTU-C Installation and Maintenance Practice
6
61247004L1-5A
Recommended maximum local loop loss information for PIC cable at 70°F, 135
Ω
, resistive
termination is provided in
An approximation for the maximum amount of wideband noise on an HDSL local loop as
measured by a 50 kbps filter is
≤
31 dBrn.
An approximation for the maximum level of impulse noise as measured using a 50 kbps filter
on an HDSL loop is
≤
50 dBrn.
NOTE
These approximations are to be used as guidelines only and may
vary slightly on different loops. Adhering to the guidelines should
produce performance in excess of 10
-7
BER.
Table 3. HDSL Loss Values
(200 kHz cable loss in dB/kft at 135
Ω
)
Cable Gauge
Cable Type
Temperature:
68°
90°
120°
26
PIC
3.902
4.051
4.253
26
Pulp
4.030
4.179
4.381
24
PIC
2.863
2.957
3.083
24
Pulp
3.159
3.257
3.391
22
PIC
2.198
2.255
2.333
22
Pulp
2.483
2.45
2.629
19
PIC
1.551
1.587
1.634
19
Pulp
1.817
1.856
1.909
Table 4. Loop Insertion Loss Data
Frequency (Hz)
Maximum Loss (dB)
3,000
12.0
10,000
15.0
50,000
25.5
100,000
30.0
150,000
32.75
196,000
35.00
200,000
35.25
