Hdsl2 Deployment Guidelines; Figure 21. Deployment Guidelines - ADTRAN T200 H2TU-R Installation And Maintenance Manual

7. HDSL2 DEPLOYMENT GUIDELINES

The ADTRAN HDSL2 system is designed to provide
DS1-based services over loops designed to comply
with Carrier Service Area (CSA) guidelines. CSA
deployment guidelines are given below.
1. All loops are non-loaded only.
2. For loops with 26-AWG cable, the maximum
loop length including bridged tap lengths is 9
kft.
3. For loops with 24-AWG cable, the maximum
loop length including bridged tap lengths is
12 kft.
4. Any single bridged tap is limited to 2 kft.
5. Total bridged tap length is limited to 2.5 kft.
6. The total length of multi-gauge cable containing
26-AWG cable must not exceed
12 - {(3*L )/(9-L
26 BTAP
L =Total length of 26-AWG cable
26
excluding bridged taps (in kft)
L =Total length of all bridged taps (in kft)
BTAP
This deployment criteria is summarized in the chart
shown in Figure 21.
12
11
INVALID CABLE LENGTHS
10
9
8
7
6
5
4
3
2
VALID HDSL2 CABLE LENGTHS
1
0
0 1 2 3
WORKING LENGTH OF 26 GAUGE CABLE (KFT)

Figure 21. Deployment Guidelines

61222026L7-5B
)} (in kft)
TOTAL
BRIDGED
2.5
TAP
2.0
1.5
LENGTH
1.0
(KFT)
0.5
0.0
4 5 6 7 8
Section 61222026L7-5, Issue 2
Loop loss per kft for other wire is summarized in
Table 4.
Table 4. HDSL2 Loss Values
(200 kHz cable loss in dB/kft at 135
Cable Cable
Gauge Type
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
Recommended maximum local loop loss information
for PIC cable at 70° F, 135 Ω, resistive termination is
provided in Table 5.
Table 5. Loop Insertion Loss Data
F r q e u n e y c ( H ) z
3 0 , 0 0
0 1 0 , 0 0
0 5 0 , 0 0
1 0 0 0 , 0 0
1 0 5 0 , 0 0
1 6 9 0 , 0 0
2 0 0 0 , 0 0
2 0 5 0 , 0 0
3 5 2 0 , 0 0
An approximation for the maximum amount of
wideband noise on an HDSL2 local loop as measured
by a 50 kb filter is ≤ 31 dBrn.
An approximation for the maximum level of impulse
noise as measured using a 50 kb filter on an HDSL2
loop is ≤ 50 dBrn.
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
9
For further information regarding deployment
guidelines and applications, reference ADTRAN's
Supplemental Deployment Information for HDSL/
HDSL2 document, P/N 61221HDSLL1-10.
Ω
Temperature:
° ° °
68 90 120
M a i x m u m L o s s d ( ) B
2 1 0 .
5 1 0 .
5 2 5 .
0 3 0 .
3 . 2 5 7
5 3 0 .
3 . 5 5 2
7 3 5 .
4 . 2 0 0
NOTE
-7
BER.
)
17