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HAYS9600.TXT
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[ HAYES 9600 Modem Features ]
This file was put together in an effort to disspell some of the rumors and
inaccuracies about the recently-announced HAYES 9600 baud modems.
Well, HAYES finally announced their new line of 9600 baud modems, known as the
V-Series. Of course, these modems are not compatible with any of the 9600 baud
modems currently on the market (as of 6-18-87). There are, however, quite a
few similarities between the HAYES V-Series, and the U.S. Robotics Courier HST
9600 modem, which the HAYES seems to be patterned after, but not identical to.
Three versions were announced at the big COMDEX show in Atlanta last week.
First, there is the external, known as the V-series Smartmodem 9600(TM). The
modem is physically similar in both appearance and size to the HAYES Smart-
modem 2400(TM). It is, of course, fully compatible with its lower-speed
predecessors. An internal version has also been announced, the V-series Smart-
modem 9600B(TM). Additionally, an upgrade kit will be available to convert the
HAYES 2400 to 9600 baud operation. List prices are $1299 (external), $1199
(internal), and $399 (upgrade kit). A Sysop special discount offer is expected
to be offered by HAYES in the near future. The Sysop price will be $595, and
will likely be limited to two per Sysop. These modems should be available at
the end of July, 1987, according to HAYES.
Following is a description of the Smartmodem 9600 EXTERNAL modem:
The HAYES V-series 9600 external modem offers fast turnaround, half-duplex
V.32 communications at a much lower cost than V.32 full-duplex modems; error-
control and forward error-correction; increased throughput with adaptive
compression in its error-control mode; and with automatic feature negotiation.
A "ping-pong" protocol used at 9600 and 4800 bps incorporates special
synchronizing techniques for a fast line turnaround, and simulates full-duplex
V.32 operation in terminal or interactive mode, which makes it
indistinguishable from full-duplex operation. When performing fast downloads
of large data files from mainframes to PCs, or full-screen data transfers
where the volume of data in the reverse direction is small (for example: on-
line airline reservation scheduling), the ping-pong protocol automatically
allocates the direction of activity on the line in proportion to the volume of
data that is being transmitted.
The built-in error-control provides a reliable means of correcting errors that
may occur during the transmission, due to noise on telephone lines. When the
V-series Smartmodem 9600 connects to a remote V-series product, it automatic-
ally activates its error-control, using an ARQ protocol that automatically
requests a re-transmission of any corrupted data.
Error-correction in the V-series modems is achieved with Asynchronous Framing
Technique (AFT), a protocol based on the LAP-B (Link Access Protocol-Balanced)
link level portion of X.25 at 2400 bps and 1200 bps, and an extension of LAP-B
at 9600 bps and 4800 bps. At 9600 bps and 4800 bps, the V-series Smartmodem
9600 implements Trellis Encoded/Viterbi Decoding, which is a forward error
correcting technique that allows the modem to transmit data accurately, even
across noisy telephone lines at very high speeds.
When communicating with other V-series modems, the V-series Smartmodem 9600
uses adaptive compression to increase throughput and provide up to twice the
normal data transfer, thus lowering both the connect time, and transmission
costs. Adaptive compression adjusts itself to the type of data which is being
transmitted, and is automatically enabled when the modem is in error-control
mode; no user preparation or interaction of the data is necessary at either
end of the connection.
Feature negotiation makes it possible for the modem to distinguish between V-
series hardware and other HAYES modems. It then analyzes all options available
(including speed), then automatically selects the combination that maximizes
data transmission efficiency. Upon the initial modem handshake, the V-series
Smartmodem 9600 has the capability to fall back from 9600 bps to 4800, 2400,
1200 or 300 bps.
FEATURES: Benefits:
9600, 4800, 2400, 1200, Provides automatic speed selection on
and 0-300 bps transmission initial handshake in Bell and CCITT
modes. Makes the highest connection
possible.
HAYES Standard AT command User control with complete HAYES AT
Set expansion Command Set, plus subset of special
V-series commands
Asynchronous and Transmission flexibility enables com-
synchronous transmission munications with a variety of devices
through a single modem and a single
communications port.
Error-control Provides maximum reliability of com-
munications with other V-series hard-
ware. Especially suited to transmitting
program code or important text files or
spread sheets. Implementation of the
LAP-B link level portion of X.25 or Asyn-
chronous Framing Technique (AFT) at
2400 bps and 1200 bps, and extended
LAP-B derivative at 9600 bps and 4800 bps,
allow point-to-point error-control.
Adaptive compression On-line compression increases data
throughput in error-control mode,
providing up to twice the normal data
transfer and lowering both transmission
costs and connect time.
Automatic feature negotiation Automatically distinguishes between re-
mote V-series hardware and other HAYES
modems to establish appropriate connec-
tion. Analyzes all options (including speed)
available and selects combination that
maximizes data transmission efficiency.
No user interaction is required.
Flow-control options RTS/CTS. Transparent XON/XOFF,
XON/XOFF (Stop/Start), or none.
Storable configuration profiles Stores two user configuration profiles in
nonvolatile memory in addition to the
factory configuration profile.
Stored telephone numbers Stores up to four telephone numbers (36
digits) in nonvolatile memory for asyn-
chronous autodial.
Designate user profile Designate either of two stored configura-
tion profiles as the default to recall when
the modem is powered up or reset.
View configuration profiles Use modem commands to display the
active and stored configuration profiles
and any telephone numbers stored in the
modem's nonvolatile memory.
Call progress monitoring Recognizes dial tone, ringback signal, and
busy signal.
Enhanced diagnostic testing Loopback tests and modem firmware tests
check the modem's firmware ROM and
the communication link to diagnose
communication problems for quick
correction.
SPECIFICATIONS SUMMARY:
Asynchronous data formats 7 data bits with mark, space, even, odd,
or no parity; 8 data bits with no parity;
1 or 2 stop bits.
Communication standards Bell 103 (0-300 bps); Bell 212A/CCITT V.22
(1200 bps); CCITT V.22 bis (2400 bps); V.32
HDX (4800 bps); V.32 HDX (9600 bps).
Forward error correction Trellis Encoding/Viterbi Decoding in all
9600 bps modes.
Operation Full-duplex at 2400 bps and below; half-
duplex at 9600 bps and 4800 bps using
"ping-pong" protocol for fast turnaround
to simulate V.32 full-duplex operation.
Dialing capability Command-selectable tone or pulse
dialing; tone duration and spacing
variable from 50 to 255 milliseconds.
Command buffer 255 characters.
Line type Two-wire, dial-up and conditioned leased
line operation.
Echo suppressor defeat tones Bell standard: 2225 Hz +/- 10 Hz
CCITT standard: 2100 Hz +/- 15 Hz
Receive signal frequency +/- 7 Hz tolerance
Status indicators Eight LED indicators on front panel.
Interface RS-232C configured as DCE.
Rear panel Two modular telephone jacks (connects
to phone system with modular jacks
RJ11, RJ12, RJ13, RJ41S); one
RS-232C female connector (DB-25); one
female HAYES power supply connector;
on-off switch.
Audio monitor Two-inch speaker with programmable
volume control.
Power supply UL-listed 120 VAC 60 Hz input; 14 VAC
output; rectified filtered, and regulated
inside the modem. 6.5 watts maximum
power consumption.
Size 1.75in x 5.5in x 9.6in
Hardware requirements Computer (and suitable communication
software), terminal, or printer with an
RS-232C serial port; shielded RS-232C
cable with a DB-25 connector; cables that
support full functionality can be obtained
from your dealer or from HAYES.
Software compatibility Smartcom III(TM) communication software
(on both 3 1/2" and 5 1/4" disks) takes full
advantage of the modem's asynchronous
capabilities and provides a complete
communication environment.
Registration/Certification FCC registered for direct connection to
the phone system. Certified to comply
with the limits for a Class B computing
device pursuant to Subpart J or Part 15 of
FCC rules.
Warranty Two year limited warranty, extendable for
an additional two years.
HAYES is a registered trademark,
and V-series Smartmodem 9600 and
Smartcom III are trademarks of
HAYES Microcomputer Products, Inc.
(C) HAYES Microcomputer Products, Inc.
HAYES Microcomputer Products, Inc.
P.O. 105203, Atlanta, GA 30348 U.S.A.
(404) 449-8791 TELEX: 703500 HAYES USA