Adtran express 3000 User Guide

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Express 3000 User Manual
7-1
Chapter 7
Installing an Analog Modem
If you are using a PC running Windows 95/98, you can connect an 
external or internal analog modem to the Express 3000 and access an 
Internet Service Provider or host server that does not support ISDN. 
When you check 
Enable Modem
 (on the Tray Tool Menu), all 
commands sent to the COM port connected to the Express 3000 are 
passed to the external analog modem; therefore, commands cannot be 
sent to the Express 3000 when this mode is active. To resume 
communication with the Express 3000, uncheck 
Enable Modem
This chapter describes the installation procedures for both external 
and internal modems.
EXTERNAL ANALOG MODEM APPLICATION
To use an external analog modem with the Express 3000, you will 
need the following items in addition to the items provided with the 
Express 3000:
External analog modem
EIA-232 serial cable 
RJ-11 to RJ-11 telephone cable
16550 UART high-speed serial port (but only for data rates of 
230.4 kbps)
Figure 7-1 illustrates the setup for an external analog modem connect-
ed to the Express 3000. This setup requires one PC COM port and sup-
ports DTE rates of up to 115.2 kbps.
Windows NT 4.0 does not support this feature.