COMSPHERE 3800Plus Modems
1-2 October 1998 3980-A2-GB30-40
•Class 1 and Class 2 Group III Fax modulations:
ITU-T V.17 (14,400, 12,000, 9600, and 7200 bps),
V.29 (9600 and 7200 bps), and V.27ter (4800 and
2400 bps).
•Convenient migration to new or optional features
through software downloading.
•ITU-T V.42bis and MNP Class 5 data compression.
•Virtual error free data integrity with ITU-T V.42
and MNP Level 4 error control.
•Automatic and manual single call dial backup and
dial standby capabilities for 2-wire and 4-wire
leased-line applications.
•A unique Paradyne modem pooling feature that
preserves the answering modem’s permanent
configuration, but allows multiple users to
temporarily adapt parameters for individual
requirements.
•Dial-line data rates from 300 bps–33,600 bps.
Leased-line rates from 2400 bps–33,600 bps.
•Asynchronous dial DTE data rates from
300 bps–115,200 bps.
•A diagnostic control panel (DCP) that displays the
connect status, data rate, type of error control or
compression, test results, alarm status of DTE or
VF parameters for both local and remote modems.
•Storage of up to 10 telephone numbers to directory
locations.
•Compatibility with the industry de facto standard
AT Command set.
•Dialing via DCP, AT commands, DTR, or ITU-T
V.25bis commands.
•Configuration of software options via the AT
Command set or DCP.
•High-speed transmission using asynchronous,
synchronous, or UNIX devices over full- or
half-duplex dial networks or 2-wire/4-wire leased
lines.
•Complement of self-tests, local and remote
loopbacks including ITU-T compatible V.54.
•Seven factory-defined configurations and two
user-defined configuration areas.
•Originate Security and three Answer Security
modes which guard against unwanted user access to
the host DTE.
•Directory #1 Callback capability.
COMSPHERE Models
The COMSPHERE high-speed modem is available in
two models.
•The 3810Plus, a 4-wire/2-wire standalone unit
capable of operation on 2-wire dial, or 4-wire
leased or 2-wire leased lines.
•The 3811Plus, a 4-wire/2-wire carrier-mounted
modem for installation into a COMSPHERE
3000 Series Carrier; it is capable of operation on
dial, or 4-wire leased or 2-wire leased lines.
SDC Feature
The Paradyne proprietary Synchronous Data
Compression (SDC) feature allows an increase of
throughput in data transmission, and has an error
correcting procedure so that transmitted data is less
sensitive to channel disturbances.
SDC can be used with V.34 and V.32 family
modulations on dial or leased lines, and in a dial backup
or standby mode. See Appendix I, Synchronous Data
Compression, for more information.
Options
3800Plus modems also may have the following
optional features:
•Leased-Line Modulations: ITU-T V.33 (14,400 and
12,000 bps) and ITU-T V.29 (9600, 7200, and
4800 bps).
•Extended Security, permitting up to
3,000 passwords (3811Plus only).
•ETC(Enhanced Throughput Cellular)
Optional ETC Feature
Enhanced Throughput Cellular (ETC) is a technology
that improves connection speed, transmission rates, and
reliability over analog cellular networks. ETC must be
installed on both sides of the connection.