Motorola and V.32bis - Manual (Page 26)

1-2 About the Modem
A
bout the M
odem
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 326XFAST Series Modem, which can operate in V.34 modulation mode
• The 326XFAST-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 Motorola-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
Motorola’s Modulus 9-slot and Modulus 21-slot rack-mounted enclosures.