ADTRAN HDSL2 - Manual (Page 61)

HDSL2 for General Distribution Installation and Maintenance Practice HDSL2 Deployment Guidelines
61223HDSL2L2-5B 51
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:
• All loops are nonloaded only.
• For loops with 26-AWG cable, the maximum loop length including bridged tap lengths is
9 kilofeet.
• For loops with 24-AWG cable, the maximum loop length including bridged tap lengths is
12 kilofeet.
• Any single bridged tap is limited to 2 kilofeet.
• Total bridged tap length is limited to 2.5 kilofeet.
• The total length of multigauge cable containing 26-AWG cable must not exceed the results
obtained in the following formula:
12–[(3*L
26)
/ (9–L
BTAP
)] (in kilofeet)
where L
26
= Total length of 26-AWG cable excluding bridged taps (in kilofeet)
and where L
BTAP
= Total length of all bridged taps (in kilofeet)
These deployment criteria are summarized in the chart shown in Figure 53 .
Figure 53. HDSL2 Deployment Guidelines
0
12
11
10
9
8
7
6
5
4
3
2
1
0
1 2 3 4
WORKING LENGTH OF 26 GAUGE CABLE (KFT)
WORKING LENGTH OF 24 GAUGE (OR COARSER) CABLE (KFT)
5 6 7 8 9
2.5
INVALID CABLE LENGTHS
1.5
1.0
0.5
TOTAL
BRIDGED
TAP
LENGTH
(KFT)
VALID CABLE LENGTHS
2.0
0.0