Compaq Global Mini PCI 56k (V.90) Modem by 3Com
4
White Paper
0203-0799-A
Understanding Result Codes
A result code is the modem response to a command. It may be issued in either of two possible
formats: words (the long form, also known as verbose) or numeric characters (the short form,
represented by digits). The result code format is set using the Vn command:
•
V1 for words (default)
•
V0 for numeric characters
Using Online Mode
In the online mode, the transmitting modem receives characters from the computer, converts the
data to analog signals, then transmits these signals over the telephone line.
The process of altering a signal for transmission is called modulation. The receiving modem
receives analog signals from the telephone when in the online mode and converts or demodulates
the signal, returning it to the digital form that can be used by the computer.
Escaping from an Online Session to the Command Mode
Use the following steps to break out of a data transfer session (online mode) and return to
command mode:
1. Press and hold the
Shift
key and type +++.
2. An
OK
result code is displayed.
3. Enter modem commands as needed.
4. Resume online session by entering AT0 command or terminate the connection with the
ATH0 command.
Creating a Command Mode Shortcut
An easy way to issue commands to the modem is via HyperTerminal, included with Windows 95,
Windows 98, and Windows NT. You can create a shortcut for accessing HyperTerminal and
sending commands to the modem. To create a command mode shortcut on the Windows desktop:
1. Create a Command Mode icon.
2. From the HyperTerminal dialog box, click the Command icon.
3. Select
File
➪
Create Shortcut
or
Click the right mouse button.
4. A Command Mode Shortcut icon is displayed.
5. Select and drag the shortcut icon to the desktop.
6. To quit HyperTerminal, Select File
➪
Exit.
