Appendix A - Specifications

LTPH-UM-1109-01, Issue 1

 

 

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 , as shown 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

Loop Attenuation

Maximum Reach

Ω

per kft

196

kHz (dB/kft)

(dB/kft)

(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

 

 

 

 

 

 

 

(a) Insertion Loss = 1.25 times loop attenuation

56

January 9, 2002

H2TU-C-231 List 2