
                        [ 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
