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Appendix A - Specifications LTPH-UM-1109-01, Issue 1
56 January 9, 2002 H2TU-C-231 List 2
LOOP ATTENUATION,INSERTION LOSS, AND REACH
Each loop has no more than 35 dB of loss at 196 kHz, with driving and terminating impedances of 135Ω,asshown
in Table 21 below. This is equivalent to no more than 28 dB loop attenuation.
Table 21. HDSL2 Reach Chart
Cable Gauge
Insertion Loss
(a)
at
196 kHz (dB/kft)
(a) Insertion Loss = 1.25 times loop attenuation
Loop Attenuation
(dB/kft)
Maximum Reach
(kft)
Ω per kft
26/0.4 mm 3.88 3.1 9 83
24/0.51 mm 2.84 2.2 12 52
22/0.61 mm 2.18 1.7 16 32
19/0.91 mm 1.54 1.2 23 16