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System Description
Diagnostic Testing
To help you restore service quickly in the event of problems, the Dual V. 34 provides diagnostics
for accurate detection of system faults, such as: Local Test, Local Loop Test Self-Test, Digital
Loopback, Remote Digital Loopback, Remote Digital Loopback Self-Test, and End-to-End Self-
Test. All of these tests can be used from a terminal or computer using AT commands, or from an
SNMP controller.
Local and Self-Tests can also be initiated from switches on the modem's front panel. A front panel
Test Mode (TM) LED lights during all test modes, and indicates errors during Self Tests by flashing
to display detected errors.
Dual V.34 Modem Software
There are two types of computer software for use with a modem:
•
terminal emulation software
•
data communications software
Terminal emulation software essentially "downgrades" your computer to a dumb terminal. It allows
you to type at the keyboard and see responses on the video display or printer. Emulation programs
are often used to communicate with main-frame or mini-computers, and usually do not support disk
management or file transfers.
A full-featured data communications software package does allow file transfers, as well as
providing a dial directory, a script language for automated sessions, and a host of other features. Of
course, the more powerful and flexible a software package is, the more difficult it may be to master.
To take full advantage of the features of the SpectraComm Dual V.34 modem, your selected
program should allow turning off the autobaud feature. You should also be able to toggle both
XON/XOFF and hardware flow control. In addition, it should support several file transfer protocols
designed to be used with an error-correcting modem.
Modem Driver Software
The SpectraComm Dual V.34 modem is designed to interface seamlessly with Windows 95,
Windows 98, Windows 2000, and NT 4.0 via a dedicated modem device driver. You will need to
access the GDC internet site at www.gdc.com to download and install the GDC V.34 Modem
driver GDCV34.inf. The site also provides complete instructions for this procedure.
From the GDC home page click on Download software: V.34 modems. Then click on
Read inf.txt for instructions on how to update your software modem drivers.
060R122-000
Issue 15
SpectraComm Dual V.34 Modem
Installation and Operation
1-3
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