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1-13980-A2-GB30-20 November 1996
Introduction
Overview 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Features 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Options 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
COMSPHERE Models 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Overview
The COMSPHEREr 3810Plus, 3820Plus
, and
3811Plus modems, extensions of the award-winning
COMSPHERE 3800 Series, are a new generation of
full-feature, high-speed dial modems that offer reliable
asynchronous and synchronous operation over dial- or
leased-lines networks. The 3800
Plus modems’ software
defineability allows for the addition of future
enhancements and features.
Through their downloading capability, 3800Plus
modems can be upgraded to the latest firmware, requiring
no new hardware investment or on-site personnel, and
little or no downtime. These modems support a wide
range of modulation schemes and offer control using
either AT commands, the user-friendly diagnostic control
panel (DCP) or the optional COMSPHERE 6700 Series
Network Management System (NMS). The NMS
performs extensive monitoring, testing, reporting, and
restoral functions to assist in managing your network.
High-speed data transfer and reliable throughput at line
rates as high as 33,600 bps over dial lines is achieved by
employing the latest techniques in CCITT V.42bis/MNP
Class 5 data compression and CCITT V
.42/MNP error
correction. The modems can send data to the DTE at
speeds as high as 1
15,200 bps.
The 3800Plus
modem is extremely versatile when used
in modem pooling environments; it allows multiple users
to temporarily customize modem settings, thereby
permitting communication with the calling modem. Upon
disconnection, the 3800
Plus
modem falls back to its
original configuration settings and resumes normal
operation.
The modem’s compatibility with a number of dialing
methods and protocols, such as asynchronous A
T
commands, CCITT V
.25bis dialing, and the user
-friendly
diagnostic control panel (DCP), permits the 3800Plus
modem to be used in a variety of applications and
environments while also allowing control over modem
configuration, dialing, and diagnostics. The 3800Plus
modems offer preset factory configurations containing the
most often used modem settings. These factory presets
provide quick configuration for any asynchronous or
synchronous dial, synchronous leased, UNIX
r
hardware-based dial, or cellular environments.
The 3810Plus is a 4-wire/2-wire standalone modem;
the 3820Plus is a 2-wire standalone modem; the 3811Plus
is a carrier-mounted version of the 3810Plus.
Features
The 3800Plus modems have a wide variety of features.
• Dial-Line Modulations: Proprietary extensions of
V.34 (33,600 and 31,200 bps), ITU-T V.34 (up to
28,800 bps), V.34terbo (19,200 and 16,800 bps),
CCITT V.32bis (up to 14,400 bps), V.32 (up to
9600 bps), V.22bis (2400 bps), V.22 (1200 bps),
V.21 (300 bps), Bell 212A (1200 bps), and
Bell 103J (300 bps).
• Four-wire Leased-Line Modulations: Proprietary
extensions of V
.34 (33,600, 31,200, 28,800, 26,400,
24,000, 21,600, 19,200, 16,800, 14,400, 12,000,
9600, 7200, 4800, and 2400 bps), V.32terbo
(19,200 and 16,800 bps), V.32bis (14,400, 12,000,
9600, 7200, and 4800 bps), V.32 (9600 and
4800 bps), and V.22bis (2400 bps).
• Two-wire Leased-Line Modulations: Proprietary
extensions of V
.34 (33,600 and 31,200 bps), ITU-T
V.34 (up to 28,800), V.32terbo (19,200 and
16,800 bps), V.32bis (14,400, 12,000, 9600, 7200,
and 4800 bps), V.32 (9600 and 4800 bps), and
V.22bis (2400 bps).
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