RAD Data comm ASMi-52 Manual do Utilizador descarregar pdf (Página 20)

Chapter 1 Introduction Installation and Operation Manual

1-4 Overview ASMi-52 Ver. 2.5

Features

Functionality

ASMi-52 can be configured to operate in a CO (central office) or CPE (customer

premises equipment) mode.

Line Interface

ASMi-52 extends the range of data transmission over 2/4-wire lines up to 7.0 km

(4.3 miles), by employing SHDSL TC-PAM technology. ASMi-52 operation

complies with the requirements of the ITU-T G.991.2 standard. In addition, 4-wire

ASMi-52 units can be configured to operate over 2-wire lines.

Table 1-1 lists typical ASMi-52 ranges over 2/4-wire 26 AWG line.

Table 1-1. Typical Ranges (26 AWG)

Data Rate 2-wire 4-wire

[kbps] [km] [miles] [km] [miles]

64 7.5 4.6 — —

128 7.0 4.3 7.1 4.4

256 6.7 4.1 6.8 4.2

384 6.5 4.0 6.7 4.1

512 6.3 3.9 6.6 4.1

1024 5.3 3.3 6.0 3.7

1536 5.0 3.1 5.6 3.5

2048 4.5 2.8 4.7 2.9

2304 4.2 2.6 4.5 2.8

4096 – – 3.7 2.3

4608 – – 3.0 1.8

The typical ranges are based on error-free lab tests without noise.

ASMi-52CD/4W operates at data rates up to 4608 kbps, depending on internal or

external clock.

Note

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RAD Data comm ASMi-52 Manual do Utilizador Página 20