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09/10/00 16:26 Overview 1-1
Chapter 1
Introduction
This chapter describes the basic physical and functional features of the
ASM-10/8 short-range modem, as well as some typical applications. It
discusses the following topics:
•
An overview of the modem
•
Physical description
•
Functional description
•
Technical specifications.
1.1 Overview
General
ASM-10/8 is a short-range modem, which operates over unconditioned
lines. It can function in full or half-duplex mode with synchronous or
asynchronous transmission format. ASM-10/8 has an extended range of up
to 28 km (17.4 miles) on 24 AWG wire, and more depending on wire gauge
and data rate (see Table 1-1). It operates at eight selectable rates ranging
from 1.2 kbps to 19.2 kbps.
Versions
The following versions of the modem available:
•
ASM-10/8 standalone unit
•
ASM-10/8/R: a plug-in card for installation in the ASM-MN-214
19" hub, holding up to 14 cards.
Power Supply Versions
The power supply options are:
•
For the standalone power supply: 100 VAC, 115 VAC; or 230 VAC.
•
For the rack main power supply: 100 VAC, 115 VAC; or 230 VAC; or
-48 VDC, or 24 VDC.