W8SDZ@WSMR-SIMTEL20.ARMY.MIL (Keith Petersen) (11/21/88)
Here are the technical specs for USRobotics' new dual-standard modem.
This is provided "as-is" for its informational value. I am not the
author. This was provided by USR.
--Keith
--cut-here--
Courier HST Dual Standard modem
The Courier HST Dual Standard modem combines U.S. Robotics HST
asymmetrical full-duplex modulation and CCITT V.32 capability for high-
speed flexibility, performance and compatibility.
The Courier HST Dual Standard is perfect for data centers that
support both PC and mainframe applications, and where synchronous and
asynchronous capabilities are required.
The Dual Standard includes all major modulation techniques - HST,
V.32, V.22 bis, V.22, V.21, Bell 212A and Bell 103 - providing
compatibility with the vast installed base of synchronous and
asynchronous modems from 300 to 19,200 bps, including all current and
previous models of U.S. Robotics Courier HST modem.
For typical, asynchronous, PC-style applications such as one-way
file transfer, the Dual Standard modem's HST technology provides the
fastest error-free transmission available on dial-up circuits.
The Dual Standard modem V.32 capability is the versatile solution
for applications requiring true full-duplex and/or synchronous
transmission, such as host-to-host or micro-to-mainframe comunication,
remote LAN bridging, two-wire leased lines, leased line dial backup or
high-speed international standards compatibility.
In its asymmetrical HST operation, the Dual Standard modem
transmits asynchronous data at 9.6, 7.2 and 4.8 Kbps, automatically
providing the fastest data rate in response to phone line conditions.
In V.32 mode, the Dual Standard modem sends and receives asynchronous or
synchronous data at 9.6, 7.2 and 4.8 Kbps.
The Dual Standard modem also provides CCITT V.42 compatibility by
including MNP Class 1 through 4 error-control protocols. The modem also
features MNP Class 5 data compression, effectively boosting its data
rates by up to 80 percent when connected to other MNP Class 5 modems.
In HST mode, the Dual Standard uses U.S. Robotics asymmetrical
full-duplex modulation technique, splitting the phone line bandwidth
into non-overlapping high-speed and low-speed channels. The modem
automatically assigns the high-speed channel direction based on dataflow
demand. The HST technique uses trellis-coded modulation for high-speed,
error-free performance.
In V.32 mode, the Dual Standard operates simultaneous send and
receive frequencies using trellis-coded modulation and echo-concelling.
Courier HST Dual Standard is available in external and rackmounted
models. The rackmounted version works in U.S. Robotics Rackmount 30
Modular Modem System, which includes a 19-inch-wide chassis for up to 15
modem and interface boards.
DESCRIPTION
7.2 and 4.8 Kbps in V.32 mode, and at 2400, 1200 and 300 bps in either
mode.
Data Compression - MNP Service Class 5 compression, available at all
transmission speeds above 300 bps, increases effective throughput by up
to 80 percent.
Error Checking - MNP Service Classes 1 through 4 at all speeds above 300
bps (asynchronous transmission only).
Hardware/software flow control allows fixed RS-232 rates up to 19.2
Kbps.
Asynchronous or synchronous transmission on dial-up or leased lines.
Synchronous available in V.32 mode only at all speeds above 300 bps.
Auto-dial - asynchronous ("AT" command set), synchronous (nonvolatile
RAM).
Ease of Use Features:
Automatic transmission-speed adjustment guarantees highest possible
speed under a wide range of conditions.
Automatically adapts to the highest data rate supported by the
remote modem.
Speaker with volume control for audio call-progress monitoring.
On-screen and bottom label help summaries.
RS232-C pins 2 and 3 (Send and Receive data) switch-reversible for
easy use with terminal, computer or printer.
Technical Specs:
Twelve LED front panel indicators.
Local analog and digital loopback, and remote digital loopback self-
testing.
U.S./CCITT answer sequences.
Includes power adapter and RJ11C phone cord.
Two phone jacks for voice/data communications.
Size: 8.3" wide, 12.65" deep, 1.57" tall.
Power adapter UL listed, CSA approved. Supply voltage:
115 VAC, 60 Hz, 16 VAC output.
SPECIAL FEATURES
High-Speed Operation - Courier HST Dual Standard offers the most
productivity, flexibilty and compatibility.
HST mode - High-speed compatibility with all Courier HST modems.
V.32 mode - Compatible with all CCITT V.32 standard modems.
Trellis-coded modulation in both high-speed modes ensures maximum
immunity to telephone network impairments.
Nonvolatile Random Access Memory (NRAM) - Easily programmable
nonvolatile memory stores user-defined default configuration.
Phone Number Storage - Creates auto dial directory of four
frequently called phone numbers.
Automatic Dialing - "AT" command dialing and automatic dialing of
stored phone number at power on, reset command or when terminal turns on
DTR.
Synchronous Auto-Dialing - Automatically dials stored phone number,
then establishes synchronous data link.
Diagnostics - Local and remote loopback testing provides DTE,
modem and phone line diagnostic capabilities.
COMPATIBILITY
Courier HST-compatible at 9.6, 7.2 and 4.8 Kbps.
CCITT V.32-compatible at 9.6, 7.2 and 4.8 Kbps.
CCITT V.22 bis-compatible at 2400 bps.
CCITT V.22- and Bell 212A-compatible at 1200 bps.
CCITT V.21- and Bell 103-compatible at 300 bps.
Uses "AT" auto-dial command set in asynchronous mode.
CCITT V.42-compatible (MNP Class 1-4 error control).
MNP Class 5 data compression.
FCC, DOC certified.snoopy@sopwith.UUCP (Snoopy T. Beagle) (11/26/88)
In article <KPETERSEN.12448172963.BABYL@WSMR-SIMTEL20.ARMY.MIL> W8SDZ@WSMR-SIMTEL20.ARMY.MIL (Keith Petersen) writes: | The Dual Standard includes all major modulation techniques - HST, |V.32, V.22 bis, V.22, V.21, Bell 212A and Bell 103 - Many people would consider PEP to be a "major" modulation technique. | RS232-C pins 2 and 3 (Send and Receive data) switch-reversible for | easy use with terminal, computer or printer. What about the other pins that need to be swizzled? _____ /_____\ Snoopy /_______\ |___| tektronix!tekecs!sopwith!snoopy |___| sun!nosun!illian!sopwith!snoopy