RAD Data comm LRS-24 Especificações Página 15

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ASM-40CD Ver. 1.0 Overview 1-1
Chapter 1
Introduction
1.1 Overview
ASM-40CD is a card containing two independent synchronous high-speed short
range modems, operating in full- or half-duplex mode over unconditioned lines. It
is intended for installation in RAD’s LRS-24, 12-slot hub, managed by an ASCII
terminal, or the RADview SNMP management tools. The modem can also be used
as an interface converter.
The unit operates at 13 different user-selectable data rates from 32 kbps to
2048 kbps, with ranges exceeding 1.75 km (1 mile).
The modem supports a variety of digital interfaces: V.24/RS-232 (64 kbps), V.35,
X.21, RS-530, V.36/RS-449, Ethernet bridge (IR-ETH), or Ethernet/Fast Ethernet
bridge (IR-ETH/QN).
Product Options
ASM-40CD is available in the following versions:
ASM-40CDF for LRS-24F (ETSI)
ASM-40CDB for LRS-24B (ANSI).
Applications
When used as a short range modem, ASM-40CD establishes a communication link
with an identical module installed in a remote LRS-24 hub, or an ASM-40/R in a
remote ASM-MN-214 hub, or with a standalone ASM-40 modem on the other end
of the line. A typical system application for ASM-40CD units, mounted in an
LRS-24 hub, is illustrated in
Figure 1-1.
Router
Router
LRS-24
ASM-40CD
2048 kbps
2048 kbps
Central Site Remote Site
Public
Network
ASM-40
ASM-40
V.3 5
(256 kbps)
V.3 5
(256 kbps)
V.3 5
(256 kbps)
RADview
Management
Station
Figure 1-1. Typical ASM-40CD Application
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