MT5600ZDX Owner's Manual
24
• If the modem is on, the cable is plugged into the correct port, the
communications software is configured correctly, and you still
don’t get an
OK
, the fault may be in the serial cable. Make sure it
is firmly connected at both ends.
• Is this the first time you have used the cable? If so, it may not be
correct. Check the cable description on the packaging to make
sure the cable is the right one for your computer.
• Peripheral expansion cards, such as bus mouse and sound cards,
may include a serial port preconfigured as COM1 or COM2. The
extra serial port, or the card itself, may use the same COM port,
memory address, or interrupt request (IRQ) as your
communications port. Be sure to disable any unused ports.
To look for address or IRQ conflicts if you use Windows 3.1x,
select
File
,
Run
in Program Manager, type
MSD
, and press
ENTER. Then select
Mouse
,
COM Ports
, and
IRQ Status
and note
the addresses and IRQs that are in use. If you find an IRQ
conflict, note which IRQs are not being used, then change one of
the conflicting devices to use one of the unused IRQs. If you find
an address conflict, change the address of one of the conflicting
devices.
To change a port address or IRQ in Windows 3.1x, double-click
the
Control Panel
icon, then the
Ports
icon. Click on the port you
want to change, click
Settings
, click
Advanced
, and select the new
port address and/or interrupt. If you wish to use COM3 or COM4,
note that COM3 shares an IRQ with COM1, as does COM4 with
COM2, so you should change their IRQs to unused ones, if
possible.
If you use Windows 95, right-click on
My Computer
, select
Properties
from the menu, click on the
Device Manager
tab,
double-click on
Ports
, then double-click on the
Communications
Port
your modem is connected to. In the port’s Properties sheet,
click on the
Resources
tab to see the port’s Input/Output range
and Interrupt Request. If another device is using the same
address range or IRQ, it will appear in the Conflicting Device List.
Uncheck Use Automatic Settings to change the port’s settings so
they do not conflict with the other device, or select the port the
conflicting device is on and change it instead.
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