Chapter 1 – Product Description and Specifications
Multi-Tech Systems, Inc. MultiAccess ACS User Guide
5
Chapter 1 – Product Description &
Specifications
Product Description
The MultiAcces ACS single-port communications server provides connectivity to the corporate LAN for
telecommuters and mobile users, or to remotely installed equipment, via one integrated V.92/56K
modem. MultiAccess’ small size makes it ideal for users who need remote access on a limited basis, but
don’t have room for a larger system or where remote access is needed on a temporary basis for remote
diagnostics.
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 a remote node (i.e., Microsoft Dail-up Networking clients) 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 modem in the ACS can be a shared resource on your network. Computers
with network asscess to the ACS can use Telnet on port 7000 and get direct AT command access to the
modem 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
workstation(s). The redirector adds a virtual com port to the workstation and uses Telnet to map, redirect,
the com port to the modem. 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.
MCSI2000 Utility is provided on the MultiAccess CD and a summary of the parameters are presented in
Appendix E.
Modem AT Commands are presented in Appendix F.
For the latest revision of the MultiAccess User Documentation, refer to the Multi-Tech Systems, Inc. Web
site:
http://www.multitech.com
Features
•
One integrated V.92/56K modem
•
Supports dial-out for clients on IP networks
•
Modem supports V.92/56K dial-out and V.34/33.6K dial-in connections
•
Client authentication provided through RADIUS or local database
•
Callback security using local database
•
Connects to 10/100BaseT Ethernet
•
Industry-standard PPP client support
•
Web server interface for system configuration and management
•
Flash memory on modem and server for easy updates
•
Two-year warranty
