0049-1800-xxx 326X V.34, V.34-SDC and V.32bis Series Modem – USER’S GUIDE 02/23/2010
Rev. A
Page 9
of
205
CHAPTER ONE – About the Modem
Introduction
This chapter summarizes the features and options of the 326X Series Modem. The series includes:
-
The 326X V.32bis Series Modem, which operates in V.32bis modulation mode
-
The 326X
FAST
Series Modem, which can operate in V.34 modulation mode
-
The 326X
FAST
-SDC Series Modem, which can operate in V.34 modulation mode and the
Synchronous Data Compression mode
In this guide, references to the modem apply to all of the above, unless stated otherwise.
IMPORTANT
:
When you select a modulation mode, you must ensure that the Max Rate (AT*MX) and Min
Rate (AT*MN) parameter options are within the valid range for the mode.
The modem provides reliable data communication over 2-wire
dial lines
and 2-wire or 4-wire
leased lines
,
depending on the model. Dial lines are public lines to which all telephone users have access; leased lines,
also called private lines, provide a dedicated connection, over lines provided by the telephone company.
Whether you use dial or leased lines, you can operate the modem as follows:
-
Using the
front panel
: control keys and liquid-crystal display (LCD)
-
Using industry-standard (AT and AT&), and Raymar-Telenetics-enhanced
(AT
*
) AT
commands
from an attached terminal, or commands from an asynchronous communications
software package running on an attached PC
-
From a
network management system
(NMS)
-
Using
call establishment methods
, such as V.25bis or LPDA2 automatic call units (ACUs)
Figure 1-1 shows desktop, or standalone, modems. The device is also available in high-density nest cards,
which offer the same features, and can be installed in Raymar-Telenetics’ Modular Nest 9-slot and Modular
Nest 21-slot rack-mounted enclosures.
