Multi-Tech Systems MA220 사용자 설명서
MultiAccess
ACS
Introduction
This guide shows you how to setup your MultiAccess ACS analog
communication server, two-port model MA220, four-port model MA420 or eight-
port model MA820. All three units provide the same Remote Access Server,
RAS, and modem sharing capabilities except for the number of ports each can
provide. The MA420 and MA820 are provided in a desktop and rack mountable
units where as the MA220 is provided in a desktop and wall mountable unit.
communication server, two-port model MA220, four-port model MA420 or eight-
port model MA820. All three units provide the same Remote Access Server,
RAS, and modem sharing capabilities except for the number of ports each can
provide. The MA420 and MA820 are provided in a desktop and rack mountable
units where as the MA220 is provided in a desktop and wall mountable unit.
MultiAccess MA820
The MultiAccess ACS has two roles (usage), RAS and Modem Sharing.
RAS Solution: The MultiAccess can be used as a dial-in PPP Remote Access
Server in a LAN to Client environment. The purpose is to give remote nodes
(i.e., Microsoft Dail-up Networking clients) TCP/IP access to the same subnet
and LAN the ACS is installed on. Masquerading (NAT) and LAN to LAN routing
(assignment of an entire subnet) are IP networking techniques not supported by
the ACS. The supported PPP security protocol (means of communicating user
credentials between PPP end points) is PAP only.
Server in a LAN to Client environment. The purpose is to give remote nodes
(i.e., Microsoft Dail-up Networking clients) TCP/IP access to the same subnet
and LAN the ACS is installed on. Masquerading (NAT) and LAN to LAN routing
(assignment of an entire subnet) are IP networking techniques not supported by
the ACS. The supported PPP security protocol (means of communicating user
credentials between PPP end points) is PAP only.
Modem Sharing Solution: The modems in the ACS can be a shared resource on
your network, commonly referred to as a network modem pool. Computers with
network asscess to the ACS can use Telnet and get direct AT command access
to one of the modems in the ACS, for either outbound or inbound calls. A
common way to take advantage of this role is by installing Com Port Redirector
Software (i.e., Multi-Tech’s MCSI2000 for Windows) on your workstations. The
redirector adds a virtual com port to the workstation and uses Telnet to map,
redirect, the com port to a modem in the ACS. The redirector and Telnet
session replaces the UART based hardware of a PC and serial cable
connection normally found in traditional modem installations. A communication
program using this virtual com port has its data redirected to and from the
modem within the ACS, making the modem appear as if it is directly attached to
a communication port on the workstation.
your network, commonly referred to as a network modem pool. Computers with
network asscess to the ACS can use Telnet and get direct AT command access
to one of the modems in the ACS, for either outbound or inbound calls. A
common way to take advantage of this role is by installing Com Port Redirector
Software (i.e., Multi-Tech’s MCSI2000 for Windows) on your workstations. The
redirector adds a virtual com port to the workstation and uses Telnet to map,
redirect, the com port to a modem in the ACS. The redirector and Telnet
session replaces the UART based hardware of a PC and serial cable
connection normally found in traditional modem installations. A communication
program using this virtual com port has its data redirected to and from the
modem within the ACS, making the modem appear as if it is directly attached to
a communication port on the workstation.
For the latest revision of the MultiAccess User Documentation, refer to the Multi-
Tech Systems, Inc. Web site:
Tech Systems, Inc. Web site:
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