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4. 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. These
guidelines are only applicable to the first segment of
the HDSL2 circuit, between the H2TU-C and the
extender.
1. All loops are nonloaded 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 multigauge cable containing
26-AWG cable must not exceed:
12 -{(3*L
)/(9-L
26
L
=
Total length of 26-AWG cable
26
excluding bridged taps (in kft)
L
=
Total length of all bridged taps
BTAP
(in kft)
This deployment criteria is summarized in the chart
shown in Figure 3.
12
11
INVALID CSA CABLE LENGTHS
10
9
8
7
6
5
4
3
2
VALID CSA CABLE LENGTHS
1
0
0
1
2
3
WORKING LENGTH OF 26 GAUGE CABLE (KFT)
Figure 3. First Segment Deployment
Guidelines
61221045L2-5A
)}(in kft)
BTAP
TOTAL
BRIDGED
2.5
2.0
TAP
1.5
LENGTH
1.0
0.5
(KFT)
0.0
4
5
6
7
8
The guidelines listed below are applicable to the
second segment of the HDSL2 circuit, between the
extender and the H2TU-R.
1. All loops are nonloaded only.
2. For loops with 26–AWG cable, the maximum
loop length including bridge tap lengths is 8 kft.
3. For loops with 24-AWG cable, the maximum
loop length including bridged tap lengths is 11
kft.
4. Any single bridge tap is limited to 2 kft.
5. Total bridge tap length is limited to 2.5 kft.
6. The total length of multigauge cable containing
26-AWG cable must not exceed:
11 - {(3*L
L
=
26
L
=
BTAP
This deployment criteria is summarized in the chart
shown in Figure 4.
12
11
10
9
8
7
6
5
4
3
2
VALID HDSL CABLE LENGTHS
VALID HDSL CABLE LENGTHS
1
0
0
1
WORKING LENGTH OF 26 GAUGE CABLE (KFT)
Figure 4. Second Segment Deployment
9
For further information regarding deployment
guidelines and applications, refer to ADTRAN's
Supplemental Deployment Information for HDSLX,
Document 61221HDSLL1-10.
)/(8-L
)} (in kft)
26
BTAP
Total length of 26-AWG cable
excluding bridged taps (in kft)
Total length of all bridged taps
(in kft)
INVALID HDSL CABLE LENGTHS
INVALID HDSL CABLE LENTTHS
2.5
2.5
2.0
2.0
1.5
1.5
1.0
1.0
0.5
0.5
0.0
0.0
2
3
4
5
6
Guidelines
7
8
9
5
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