3com MIC-3365 Manual De Usuario
Installing the 3Com Impact Digital Modem
3
The 3Com Impact digital modem has an RS-232-C
asynchronous interface port that operates at data rates of up
to 115.2 Kbps. Some computers may need additional
hardware or driver software for reliable operation.
asynchronous interface port that operates at data rates of up
to 115.2 Kbps. Some computers may need additional
hardware or driver software for reliable operation.
IBM PCs and Compatible Computers
An IBM
PC or compatible computer must have a buffered
UART (universal asynchronous receiver/transmitter) chip, called
the 16550 UART, to operate at 115 Kbps. Under Microsoft
the 16550 UART, to operate at 115 Kbps. Under Microsoft
Windows
, run the Microsoft Diagnostic Program (
msd
) at the
DOS prompt and select COM Ports within msd. The UARTs
present in your computer are listed under each COM port.
present in your computer are listed under each COM port.
To operate at the maximum data rate, install an enhanced
16550 UART expansion card in your PC. If you have a
nonupgradable PC with a slower UART (16450 or 8250), the
3Com Impact digital modem can operate at lower data rates,
since it automatically adjusts to the PC serial COM port data
rate. The COMM.DRV driver for Windows 3.1 only allows data
rates of up to 38.4 Kbps. If you have a UART that supports
higher rates than this (for example, 16550), you must install the
TurboCom
16550 UART expansion card in your PC. If you have a
nonupgradable PC with a slower UART (16450 or 8250), the
3Com Impact digital modem can operate at lower data rates,
since it automatically adjusts to the PC serial COM port data
rate. The COMM.DRV driver for Windows 3.1 only allows data
rates of up to 38.4 Kbps. If you have a UART that supports
higher rates than this (for example, 16550), you must install the
TurboCom
enhanced driver that is provided with the digital
modem.
Apple Macintosh Computers
Motorola
68XXX-based Macintosh
systems support a
maximum asynchronous serial port data rate of 57.6 Kbps.
Power Macintosh
Power Macintosh
computers may operate at higher serial
port data rates.
Installing the 3Com Impact Digital Modem
Follow the appropriate procedure for installing the
3Com Impact digital modem in your computer. Refer to
Figure 1 during the installation procedure.
3Com Impact digital modem in your computer. Refer to
Figure 1 during the installation procedure.
09-0700-002 Page 3 Sunday, December 22, 1996 3:40 PM