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This document is intended to be used in conjunction with the COMSPHERE 392xPlus Modems, Models 3920Plus
and 3921Plus, Technical Reference Manual, Document No. 3920-A2-GH30. This manual is available online at
www.paradyne.com. Select Library -> Technical Manuals -> Business Class Analog Modems.
Ordering Information
Call your sales representative to order additional product documentation or to verify the correct model number for
your geographic area.
COMSPHERE 3920Plus Modem
The Model 3920Plus singleport modem is a standalone modem (Figure 1) capable of either 4-wire/2-wire
leased-line or dial operation. This modem is controlled using either AT commands or the DCP. The DCP consists
of a liquid crystal display (LCD), three function keys, four directional keys, and a row of 13 LED status
indicators. For a better understanding of DCP operation, refer to Chapter 3, DCP Operation, in the Technical
Reference Manual.
STATUS
INDICATORS
2
DIAGNOSTIC
CONTROL
PANEL
LCD AND
KEYPAD
LEASED
DIAL
DTE 1
NMS
POWER IN
Figure 1. Model 3920Plus Modem (North America Model)
POWER
ON/OFF
February 2002
POWER
SUPPLY
97-14678-02
3920-A2-GK47-10
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