ADTRAN 3000 - Manual (Page 83)

61203153L2-20 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.