System information

FCD 901 48
Issue R2A, 07.2009
XMP1 Release 5.5 System Description
SHDSL
Aastra Proprietary Information Page 5-7
Assumption: At least 6 dB system margin, NEXT 55 dB, parallel
operation of one or two SDSL links at 2048 kbit/s.
Under favorable conditions, i.e. low line attenuation combined with
minimum noise, the values specified above can be clearly exceeded.
A further increase in the coverage range is possible by reducing the
transmission bandwidth (see Fig. 5.2: Power spectral densities at
2048 kbit/s).
Figure 5.2: Power spectral density - SDSL 2048 kbit/s
Table 5.A: Transmission ranges - Approximate values
CONDUCTOR
DIAMETER
KILOMETRICAL
ATTENUATION
@ 200 KHZ
NOISE LEVEL
CAUSED BY
NEAR-END
CROSS-TALK
ATTENUATION
(NEXT)
MAX. RANGE
WITH 1-PAIR
OPERATION
0.4 mm 11 dB
-40 dBm
2.2 km
0.6 mm 6 dB 4.2 km
0.9 mm 3.5 ... 4.5 dB 5.5 ... 7 km
1.2 mm 2.5 ... 3.3 dB 7.5 ... 10 km