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Hayes Ultra Series Setup information.
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ABOUT THIS REFERENCE CARD:

The operational features of your modem can be accessed through direct
commands as well as through the menus of full-featured communications
software like Hayes Smartcom II and Smartcom III. For those users whose
applications require instructions be given to the modem directly, the
various sections of this card list the AT Commands that can be issued to
control the modem, the S-Registers that can be used to further configure
it, and the Result Codes the modem returns in response to commands and
call progress monitoring.

This card also includes a chart outlining the modem-to-DTE cabling
requirements for optimum use of the modem in all its operating modes.

The V-series System Product User's Reference provides general suggestions
for using command and register options to configure a V-series system
product to be used with a particular computer and software. This card is
the primary reference for the AT Commands, Result Codes, and S-Registers
supported by your modem. For information on using the modem in V.25bis
command mode, see the CCITT V.25bis Reference Card.

WHEN TO USE AT COMMANDS:

Aside from selected AT Commands in a setup or initialization string within
your software, most communications software does not require modem
control with commands. Note that the use of AT Commands is not a
substitute for the features provided by commercial software. On-line
activities must be performed by software; no AT Commands are available,
for example, for file transfers between connected systems.

IMPORTANT: To use the modem, even with AT Commands, communications
software or some program that performs "terminal emulation" is required.
Commands cannot be issued from your computer's operating system prompt.

COMMAND FORMAT:

AT commands are issued from the modem's command state in the following
format.

Command Prefix - AT

The AT prefixes the command line to get the modem's attention, detect the
speed at which the computer is sending information to the serial port,
and recognize the character format (way the information is structured).

Commands and Parameters:

The command tells the modem what action to take. AT Commands are either a
single letter or a letter preceded by an ampersand(&). For example, the Q
command determines whether the modem returns result codes in response to
commands, and the &D command controls the modem's use of the DTR signal.

The parameter (0,1,2,etc.) follows a command to tell the modem which
option to use. If a parameter is not specified, the modem assumes the 0
(zero) option. For example, E is the same as E0. Several commands can be
issued on a single line as long as it does not exceed 255 characters.
Although Q1 is one command, it counts as two characters in the command
line.

End of Line Character:

The <--- terminates the command line and sends the instructions from the
computer to the modem. The particular character used to perform this
function on your keyboard might be the Return key or the Enter key.

Escape Sequence - +++

The escape sequence returns the modem to the command state from the
on-line state. The escape sequence is issued on a line by itself and is
sent without the AT prefix and the <--- command line terminator. The escape
sequence includes a guard time bracketing the three characters. Both the
character used and the duration of the guard time can be changed, if
desired, by writing to S-Registers 2 and 12, respectively.

ISSUING AT COMMANDS:

When the modem powers up, it enters the "command state," ready to accept
instructions (unless command recognition has been disabled by "dumb mode"
configuration). The modem also enters the command state when a connection
is broken. When you use the D or A commands to make a connection, the
modem enters the "on-line state". Anything you type is sent to the modem
and computer on the other end of the line when the modem is in the on-line
state.

To enter commands while still connected to another modem, issue the escape
sequence (+++). The modem will enter the command state, ready to accept
commands. When you are ready to go on-line again, simply issue the OO
command.

AT COMMAND SUMMARY:

V-series ULTRA Smartmodem 9600 supports the AT Commands listed on this
card. If you issue an AT Command not included in this listing, the modem
will return an ERROR result code. Always precede the command option with
the AT prefix and end the line with <--- (except when issuing A/ and +++).

The most frequently used command is the D command and its dial modifiers
(see below). The D command causes the modem to originate a telephone call
and the dial modifiers initiate the desired features. For example, AT DT9
W 555-2369 <--- instructs the modem to dial in the following way. The
modem dials the access code 9 using the tone method (T), waits for a
second dial tone (W), then dials the specified number (555-2368). The
modem waits for a carrier tone from the modem at the other end of the
line. If no carrier is detected within a given time (see S-Register 7;
factory setting is 50 seconds), the modem automatically releases the line
and sends the result code NO CARRIER. If a carrier signal is detected, the
modem sends the result code CONNECT and goes on-line, thereby permitting
communication with the remote modem.

Command options listed in bold type are those preselected in memory as
part of the modem's factory configuration. These options are referred to
as factory settings.

COMMAND DESCRIPTION
------- ------------
A Enter answer mode; go off hook, attempt to answer incoming
call, and go on-line with another modem

A/ Re-execute previous command line; not preceded by AT nor
followed by <---

BO Initiate calls using V.22 at 1200 bps

B1 Initiate calls using 212A at 1200 bps

B2 If originating a call using V.23, transmit at 75 bps and
receive at 1200 bps. If answering and NO selected, transmit
at 1200 bps and receive at 75 bps.

B3 If originating a call using V.23, transmit at 1200 bps and
receive at 75 bps. If answering and NO selected, transmit at
75 bps and receive at 1200 bps.

B15 Initiate calls using V.21 at 300 bps

B16 Initiate calls using 103 at 300 bps

B41 Initiate a call using V.32 at 4800 bps

B42 Initiate a call using ping pong (half duplex) at 4800 bps

B60 Initiate a call using V.32 at 9600 bps

B61 Initiate a call using ping pong (half duplex) at 9600 bps

D Enter originate mode; go off hook and attempt to go on-line
with another modem


MODIFIER DESCRIPTION
-------- -----------

0-9*#ABCD Specifies letters, numbers, and symbols
the modem will use when dialing

T Dials using Tone method

P Dials using Pulse method

' Pauses before continuing

W Waits for second dial tone

@ Waits for quiet answer

! Issues timed break recall (flash)

R Places call in reverse mode (to call an
originate-only modem)

; Returns to command state after dialing and
maintains the connection

S=n Dials phone number n (0-3) stored with
&Zn=x


COMMAND DESCRIPTION
------- -----------

E0 Do not echo characters from the keyboard to the screen in
command state

E1 Echo characters from the keyboard to the screen in command
state

H0 Hang up and place modem in command state

H1 Go off hook and operate auxiliary relay

I0 Display product code (3-digit number)

I1 Calculate ROM checksum (3-digit number)

I2 Verify ROM checksum of modem (OK or ERROR)

L0-L1 Set low speaker volume

L2 Set medium speaker volume

L3 Set high speaker volume

M0 Turn speaker off

M1 Turn speaker on until carrier detected

M2 Turn speaker on

M3 Turn speaker on until carrier detected, except during dialing

N0 When originating or answering, handshake only at speed
specified by S37

N1 When originating, permit negotiation of a common communication
standard at highest associated line speed supported by both
modems. Begin negotiations from the DCE line speed specified
in S37, falling back to a lower speed if necessary. When
answering, fall back from V.32 or V.32 ping pong (half
duplex) to V.22/212A/V.22bis, then V.21/103

N2 When originating, permit negotiation of a common communication
standard at highest associated line speed supported by both
modems. Begin negotiations from the DCE line speed specified in
S37, falling back to a lower speed if necessary. When answering,
fall back from V.32 or V.32 ping pong (half duplex) to
V.22/212A/V.22bis, then V.23/V.21/103

COMMAND DESCRIPTION
------- -----------

N3 When originating, handshake only at speed specified by S37.
When answering, fall back from V.32 or V.32 ping pong (half
duplex) to V.22/212A/V.22bis, then V.21/103

N4 When originating, handshake only at speed specified by S37.
When answering, fall back from V.32 or V.32 ping pong (half
duplex) to V.22/212A/V.22bis, then V.23/V.21/103

N5 When originating, permit negotiation of a common communication
standard at highest associated line speed supported by both
modems. Begin negotiations from DCE line speed specified in
S37, falling back to a lower speed if necessary. When answer-
ing, handshake only at speed specified by S37

O0 Go to on-line state

O1 Go to on-line state, initiate retrain

Q0 Return result codes

Q1 Do not return result codes

Q2 Return result codes in originate mode, do not return result
codes in answer mode

Sr? Read and respond with current value of register r (r=number
of register; ? requests value)

Sr=n Set the value of register r to n (n=value within range of
register r)

V0 Display result codes as numbers

V1 Display result codes as words

W0 Do not return negotiation progress messages

W1 Return negotiation progress messages

W2 Do not return negotiation progress messages; return CONNECT
messages using modem-to-modem (DCE) speeds instead of modem-
to-DTE speeds

X0 Provide basic call progress features to enable connection, no
carrier, and ring detection

X1 Provide basic call progress features and connection speed with
appropriate result codes

X2 Provide basic call progress features, connection speed, and
dial tone detection

X3 Provide basic call progress features, connection speed, and
busy signal detection

X4 Provide basic call progress features, connection speed, busy
signal and dial tone detection

Y0 Do not respond to longspace disconnect

Y1 Respond to longspace disconnect

Z0 Reset and recall stored user profile 0

Z1 Reset and recall stored user profile 1

&C0 Presume presence of carrier detect signal

&C1 Track the status of carrier detect signal

&C2 Presume presence of carrier detect signal until on-line, then
track status of signal

&D0 Ignore the status of DTR signal

&D1 Monitor DTR signal. When an on-to-off transition of DTR signal
occurs, the modem enters command state. Return to the on-line
state (if the connection has not been broken) when the 00
command is issued.

&D2 Monitor DTR signal. When an on-to-off transition of DTR signal
occurs, hang up and enter the command state

&D3 Monitor DTR signal. When an on-to-off transition of DTR signal
occurs, hang up and perform a reset

&F Recall factory configuration as active configuration

&G0 Use no guard tones

&G2 Use 1800 Hz guard tones

&J0 Configure for RJ-11, RJ-41S, RJ-45S telco jacks

&J1 Configure for RJ-12, RJ-13 telco jacks

FOR JACK SETTING WHEN CONFIGURED FOR MI/MIC OPERATION,
SEE REGISTER S-92

&K0 Disable local flow control

&K1 Enable RTS/CTS local flow control

&K2 Enable XON/XOFF local flow control

&K3 Enable RTS/CTS local flow control

&K4 Enable XON/XOFF local flow control

&K5 Enable transparent XON/XOFF local flow control

&L0 Configure for dial-up operation

L1 Configure for private speechband circuit
(conditioned leased line) operation

&On Enter X.25 PAD command state of channel n (0-3)
from AT command state; if a parameter is not specified,
the modem will return to the command state of the
channel last selected

&Q0 Communicate in asynchronous mode

&Q1 Communicate in synchronous mode 1 - Async-to-Sync

&Q2 Communicate in synchronous mode 2 - Stored Number Dial

&Q3 Communicate in synchronous mode 3 - Voice/Data Switch

&Q4 Communicate in synchronous mode 4 - Hayes AutoSync

&Q5 Communicate in error-control mode

&Q6 Communicate in asynchronous mode with automatic speed
buffering - for interfaces requiring constant speed
between the DTE (computer/terminal) and the DCE (modem)

&R0 Track CTS according to RTS

&R1 Ignore RTS; assume presence of CTS

&S0 Assert DSR signal always

&S1 Assert DSR signal prior to handshake operation

&S2 Assert DSR signal after handshake negotiation, but
before CONNECT XXXXX result code sent to DTE

&T0 Terminate test in progress

&T1 Initiate local analog loopback

&T3 Initiate local digital loopback

&T4 Grant request from remote modem for remote digital loopback

&T5 Deny request from remote modem for remote digital loopback

&T6 Initiate remote digital loopback

&T7 Initiate remote digital loopback with self test

&T8 Initiate local analog loopback with self test

The &T commands must be entered when the modem is
configured for &Q0.

&U0 Enable trellis coding (V.32 9600 bps only)

&U1 Disable trellis coding

&V View active configuration, user profiles, and stored
telephone numbers

&W0 Write storable parameters of current configuration in
memory as profile 0

&W1 Write storable parameters of current configuration in
memory as profile 1

&X0 Derive transmit clock signal from modem's internal
oscillator (internal clock signal on pin 15)

&X1 Derive transmit clock signal from attached computer
(external clock signal on pin 24)

&X2 Derive transmit clock signal from receive carrier
(slave receive clock signal on pin 15)

&Y0 Specify stored user profile 0 as power-up configuration

&Y1 Specify stored user profile 1 as power-up configuration

&Zn=x Store phone number x in location n (0-3)

RESULT CODE SUMMARY:

When you issue a command, the modem responds with a result code to
indicate whether it understands and can act on the instructions
(either OK or ERROR). In addition, result codes report the progress
of a connection. With the V command options, you can choose whether
result codes are reported as words or numbers (see the chart below);
the factory setting is as words (V1). You can also select the set of
result codes you want reported during call progress with the X and W
command options. If you prefer not to have the modem return result codes,
or if the software you are using does not handle responses from the
modem, you can turn off result codes with the Q1 command option.

COMMAND RESPONSE AND CALL PROGRESS MONITORING:

The factory setting enables the extended set of result codes for call
progress monitoring (X4). When set up in this way, the modem performs and
reports full call progress monitoring (RING, NO CARRIER, NO DIALTONE, and
BUSY). It also indicates the speed of the connection (CONNECT 1200 as
opposed to simply CONNECT).

NUMBER WORD EXPLANATION
------ ---- -----------

0 OK Command executed

1 CONNECT Connection at 0 to 300, 1200,
1200/75, 75/1200, 2400, 4800
9600, 19200, or 38400 bps is X0
selected; otherwise, at 0-300 bps

2 RING Ring signal indicated

3 NO CARRIER Carrier signal not detected, or lost

4 ERROR Invalid command, checksum, error in
command line or command line exceeds
255 characters

5 CONNECT 1200 Connection at 1200 or 1200/75, 75/1200,
bps (disabled by X0)

6 NO DIALTONE No dial tone detected. Enabled by X2 or
X4, or W dial modifier

7 BUSY Engaged (busy) signal detected. Enabled
by X3 or X4

8 NO ANSWER No silence detected when dialing a system
not providing a dial tone. Enabled by @
dial modifier

10 CONNECT 2400 Connection at 2400 bps (disabled by X0)

11 CONNECT 4800 Connection at 4800 bps (disabled by X0)

12 CONNECT 9600 Connection at 9600 bps (disabled by X0)

14 CONNECT 19200 Connection at 19200 bps (disabled by X0)

22 CONNECT 1200/75 Connection at 1200 bps when transmitting
and 75 bps when receiving

23 CONNECT 75/1200 Connection at 75 bps when transmitting and
1200 bps when receiving

28 CONNECT 38400 Connection at 38400 bps (disabled by X0)

NEGOTIATION PROGRESS MESSAGES:

V-series system products report special result codes during error-control
negotiation. Whether or not these messages are displayed is selected with
the W command. The factory setting is messages disabled (W0) to avoid
conflict with software programs that do not support this additional level
of call progress monitoring.

NUMBER WORD EXPLANATION
------ ---- -----------

40 CARRIER 300 Carrier detected at 300 bps

44 CARRIER 1200/75 Carrier detected, at 1200 bps when sending
and at 75 bps when receiving

45 CARRIER 75/1200 Carrier detected, at 75 bps when sending
and at 1200 bps when receiving

46 CARRIER 1200 Carrier detected at 1200 bps

47 CARRIER 2400 Carrier detected at 2400 bps

48 CARRIER 4800 Carrier detected at 4800 bps

50 CARRIER 9600 Carrier detected at 9600 bps

66 COMPRESSION: MNP5 compression negotiated
CLASS 5

67 COMPRESSION: V.42bis compression negotiated
V.42BIS

68 COMPRESSION: Hayes Adaptive Data
ADC Compression negotiated

69 COMPRESSION: No compression negotiated
NONE

70 PROTOCOL: Asynchronous mode
NONE

71 PROTOCOL:ERROR- Error-control mode with LAPB protocol
CONTROL/LAP-B

72 PROTOCOL: Error-control mode with extended
CONTROL/LAP-B/HDX protocol in half-duplex

73 PROTOCOL: ERROR- Error-control mode with AFT
CONTROL/AFT

74 PROTOCOL: Synchronous X.25 connection established
X.25/LAP-B with a carrier speed of 1200, 2400, 4800,
or 9600 bps

75 PROTOCOL: Synchronous X.25 half-duplex connection
X.25/LAP-B/HDX established with a carrier speed of 4800
or 9600 bps

76 PROTOCOL:X.25/ Asynchronous X.25 connection
X.25/LAP-B/AFT Established; AFT used

77 PROTOCOL: V.42 LAP-M
LAP-M

78 PROTOCOL: V.42 LAP-M with half-duplex
LAP-M/HDX

79 PROTOCOL: V.42 LAP-M with AFT
LAP-M/AFT

80 PROTOCOL: Alternative protocol (MNP compatible)
ALT

91 AUTOSTREAM: Multiplexing of muliple virtual channels
LEVEL 1

92 AUTOSTREAM: Transparent control of one PAD
LEVEL 2 (non-simultaneous)

93 AUTOSTREAM: Transparent control of all PADs
LEVEL 3 (simultaneous)

S-REGISTER SUMMARY:

S-Registers are special memory locations that hold values used by the
modem for configuration and operating parameters. All V-series system
products incorporate the group of S-Registers associated with Smartmodem
product functions. These registers serve as counters, timers, and
frequently used ASCII characters. A second group, associated with
V-series functions, are used to configure the modem's feature
negotiation options. A third group adjusts various modem PAD options.

Changes to S-Register values can be made with the Sr=n command and read
with the Sr? command. For a complete description of each S-Register, see
the V-series System Product User's Reference. Factory-set values are
indicated by bold type.

SMARTMODEM REGISTERS:

These registers can be adjusted to suit the desired configuration of the
modem within the range of values indicated in the Range/Units column
below. A + in the Factory Setting column indicates the value of this
register cannot be stored as part of a user-defined profile. When the
modem is reset, the factory setting for this register will be recalled
from memory.

FACTORY
REGISTER DESCRIPTION RANGE/UNITS SETTING
-------- ----------- ----------- -------
S0 Select ring to answer on 0-255 rings 0

S1 Ring count (incremented 0-255 rings 0+
with each ring)

S2 Escape sequence character 0-127 ASCII 43

S3 Carriage return character 0-127 ASCII 13+

S4 Line feed character 0-127 ASCII 10+

S5 Back space character 0-32, 127 ASCII 8+

S6 Wait before blind dialing 2-255 sec 2

S7 Wait time for carrier 1-255 sec 50

S8 Duration of delay for 0-255 2
comma

S9 Carrier detect response time 1-255 1/10 sec 6

S10 Delay carrier loss to hang 1-255 1/10 sec 14
up

S11 Duration/spacing of tones 50-255 msec 95

S12 Escape sequence guard time 0-255 1/50 sec 50

S18 Select test timer 0-255 sec 0

S25 DTR change detect time 0-255 1/100 secY 5

S26 RTS/CTS delay 0-255 1/100 sec 1

S30 Automatic timeout. This 0-255 10 sec 0
register monitors the
activity on the line. The
factory setting is 0, timer
disabled

Y When the modem is configured for synchronous operation,
and until on-line, units are measured in seconds rather
than in 1/100 seconds.

S-SERIES REGISTERS:

The values held in the S-Registers described below select between
several operating conditions. The values written to these registers
(except the status response registers S85 and S86) can be stored in
memory as part of a user-defined profile with the &W command options.

REGISTER S36:

Negotiation fallback - When the initial attempt to connect in
error-control mode fails, this register specifies the subsequent action
that should be taken.

VALUE EXPLANATION
----- -----------

0 Hang up

1 Attempt a standard asynchronous connection (&Q0)

3 Attempt an asynchronous connection using automatic
speed buffering (&Q6)

4 Attempt a V.42 Alternative Protocol connection
(MNP compatible); if negotiation fails, hang up

5 Attempt a V.42 Atlernative Protocol connection
(MNP compatible); if negotiation fails, attempt
a standard asynchronous connection

7 Attempt a V.42 Alternative Protocol connection
(MNP compatible); if negotiation fails, attempt
an asynchronous connection using automatic
speed buffering

NOTE: The selected fallback option can be initiated immediately with
Register S48. For example, a connection attempt using the
Alternative Protocol can be forced by setting S48=128 and
S36=5 or 7.

REGISTER S37:

Maximum DCE line speed - selects the speed (for all modes except V.25bis)
at which the modem attempts to connect with a remote modem; speed will be
the highest DCE speed supported by both modems not exceeding the speed
specified by this register. (See S93 for V.25bis modes).

VALUE EXPLANATION
----- -----------

0 Speed of last AT Command issued

1 75 bps

2 110 bps

3 300 bps

5 1200 bps

6 2400 bps

7 4800 bps

9 9600 bps

REGISTER S38:

Delay before forced hang up - specifies the number of seconds the modem
waits when in error-control mode (&Q5) before performing the disconnect
operation after receiving the command to hang up or an on-to-off
transition of DTR. The range of this register is 0-255 seconds; the
factory setting is 20 seconds. If the register is set to a value between 0
and 254, the modem will wait that number of seconds, or until all data
has been transferred, before hanging up. If the register is set to 255,
the modem does not hang up until all data is transferred.

REGISTER S46:

Error-control protocol selection - specifies the error-control method
used for subsequent connections

VALUE EXPLANATION
----- -----------

0 Either LAPM or fallback to LAPB

1 LAPB only

2 LAPM or fallback to LAPB; use data compression+

3 LAPB with data compression+

6 X.25 or fallback to LAPB; use data compression+

136 LAPM only

138 LAPM with data compression+

134 X.25

+ The technique negotiated is determined by capabilities and
configuration of both modems. V.42bis is attempted first, then Hayes
Adaptive Data Compression. If neither method is supported by both modems,
or if either modem has compression disabled, no compression will be used.

REGISTER S48:

Feature negotiation action - selects how feature negotiation is used when
making connections with the remote system. The negotiation process can be
tailored to suit a connection or bypassed altogether. For example, when
the capabilities of the remote modem are known, negotiation is
unnecessary. The factory setting is 7, negotiation enabled.

VALUE EXPLANATION
----- -----------

0 Negotiation disabled; presume the remote modem is
configured for and has the capabilities necessary for
the connection selected with S46

3 Negotiation enabled, but originating modem remains silent
during detection phase for connections with MNP modems;
defeats connection sequence with other V.42 modems

7 Negotiation enabled

128 Negotiation disabled; forces fallback options specified
in S36 to be taken immediately

REGISTER S49:

Buffer lower limit - specifies the minimum size of the buffer used in
error-control or automatic speed buffering mode. The range is 1-249
bytes; the factory setting is 8.

REGISTER S50 :

Buffer upper limit - specifies the maximum size of the buffer used in
error-control or automatic speed buffering mode. The range is 2-250
bytes; the factory setting is 16.

REGISTER S63:

Leased line carrier level - selects the carrier power level in dBm for
leased line operation. This register specifies a carrier level value that
is not to be exceeded. The range for this register is 0-15 (0 dBm to
-15 dBm). The factory setting is 0.

REGISTER S69:

Link layer window size - sets the number of frames (packets) sent between
acknowledgements from the remote system. The range is 1-15 with a factory
setting of 15. LAPM connections use a window size of 1-15; LAPB
connections and X.25 connections use a window size of 1-8. If a LAPB or
X.25 connection is made, any value greater than 8 is treated as 8.

REGISTER S70:

Maximum number of retransmissions - determines how many times the modem
will retransmit a frame. The range is 0-255 retries with a factory
setting of 10.

REGISTER S71:

Link layer timeout - sets the delay between retransmissions to the remote
system. The range is 1-255 1/10 seconds, with a factory setting of 2 (200
milliseconds).

REGISTER S72:

Loss of "flag idle" timeout - specifies the interval between idle flags.
The range is 1-255 seconds with a factory setting of 30.

REGISTER S73:

No activity timeout - specifies the period of inactivity (no data, only
good carrier and flag idle received) before the modem sends a query (an
"RR") to the remote modem to verify that it is operating properly. The
range is 1-255 seconds with a factory setting of 5.

REGISTER S82:

Break signaling technique - selects a method of break signal handling for
V.42 communications: in sequence, expedited, and destructive. Break
signals provide a way for you to get the attention of the remote host.
The break type used depends on your application.

VALUE EXPLANATION
----- -----------

3 "Expedited" signaling regardless of its sequence in data
sent and received; data integrity maintained

7 "Destructive" signaling regardless of its sequence in
data sent and received; data in process at time is
destroyed

128 "In sequence" signaling as data is sent and received; data
integrity maintained ahead of and after break.

REGISTER S84:

Adaptive start up negotiation (ASU) - selects the adaptive start up
method to be negotiated for subsequent connections.

VALUE EXPLANATION
----- -----------

0 Do not negotiate ASU connection

128 Negotiate ASU with fixed start up

129 Negotiate ASU with fast start up on both sides

130 Negotiate ASU with smooth start up on both sides

131 Negotiate ASU with configuring modem using fast
start up and the other modem using smooth start up

132 Negotiate ASU with configuring modem using smooth
start up and the other modem using fast start up

REGISTER S85:

ASU negotiation report - indicates which adaptive start up method has
negotiated for the current connection. To read this register, issue the
escape sequence to place the modem in the command state, then issue
ATS85?<---. The modem will report one of the values below.

CODE EXPLANATION
---- -----------

0 ASU not negotiated; fixed start up in use

128 ASU negotiated with fixed start up

129 ASU negotiated with fast start up on both sides

130 ASU negotiated with smooth start up on both sides


131 ASU negotiated with reporting modem using fast start up
and the other modem using smooth start

132 ASU negotiated with reporting modem using smooth start up
and the other modem using fast start up

REGISTER S86:

Connection failure cause code - helps determine the cause of a connection
failure. When the modem issues a NO CARRIER result code, a value is
written to this S-Register. To read this register following the connection
failure, issue ATS86 <---. The modem will report one of the values below.

CODE EXPLANATION
---- -----------

0 Normal hang up; no error occurred

4 Physical carrier loss

5 Feature negotiation failed to detect presence of another
error-control modem at the other end

6 Other error-control modem did not respond to feature
negotiation message sent by this modem

7 Other modem is synchronous-only; this modem is
asynchronous-only

8 Modems could not find a common framing technique

9 Modems could not find a protocol in common

10 Incorrect Feature negotiation message sent by other modem

11 Synchronous information (data or flags) not received from
other modem. Modem waited 30 seconds before hanging up

12 Normal disconnect initiated by other modem

13 Other modem did not respond after many transmissions of the
same message. Modem made 10 attempts then hung up

14 Protocol violation occurred

15 Compression failure


REGISTER S92:

MI/MIC operation - enables (chooses method) or disables the mode
indicate/mode indicate common interface. The settings available for this
register support various combinations of edge and level detection in
either originate or answer mode with ring indicator (RI) pulse enabled or
disabled. Note that setting this register to a value other than the
factory setting (0) automatically redefines the jack setting specified
with the &J command.

VALUE EXPLANATION
----- -----------

0 MI/MIC disabled

1 level triggered, originate mode, RI pulse enabled

3 edge triggered, originate mode, RI pulse enabled

5 level triggered, answer mode, RI pulse enabled

7 edge triggered, answer mode, RI pulse enabled

9 level triggered, orginate mode, RI pulse disabled

11 edge triggered, originate mode, RI pulse disabled

13 level triggered, answer mode, RI pulse disabled

15 edge triggered, answer mode, RI pulse disabled

REGISTER S93:

V.25bis DTE interface speed - selects the speed used when the modem is
configured for V.25bis mode. When autobauding in any mode other than
V.25bis, the modem uses the value held in S37.

VALUE EXPLANATION
----- -----------

3 300 bps

5 1200 bps

6 2400 bps

7 4800 bps

9 9600 bps

REGISTER S94:

Command mode selector - provides an alternative to setting internal DIP
switches when choosing between the AT command mode (factory setting) and
the various CCITT V.25bis command modes supported by the modem. To use
this register, DIP switches 3 and 4 must both be in the UP position
(factory setting).

VALUE EXPLANATION
----- -----------

0 Standard AT command operation (factory setting)

1 Asynchronous V.25bis using addressed access

2 Synchronous V.25bis (HDLC framing) using addressed access

3 Synchronous V.25bis (Character framing) using addressed
access

5 Asynchronous V.25bis using direct access

6 Synchronous V.25bis (HDLC framing) using direct access

7 Synchronous V.25bis (Character framing) using direct
access

9 Asynchronous V.25bis using addressed access with EBCDIC
character set option

10 Synchronous V.25bis (DHLC framing) using addressed access
with EBCDIC character set option

11 Synchronous V.25bis (Character framing) using addressed
access with EBCDIC character set option

13 Asynchronous V.25bis using direct access with EBCDIC
character set option

14 Synchronous V.25bis (HDLC framing) using direct access
with EBCDIC character set option

15 Synchronous V.25bis (Character framing) using direct
access with EBCDIC character set option

REGISTER S95:

Negotiation message options - enables various result codes that indicate
the sequence of events in the establishment of an error-control
connection (these are listed under "Result Codes"). This register does
not affect the way in which the modem negotiates the connection; it
merely enables message options. The factory setting for this register is
value 0, not bits selected. To enable any combinatin of the bits, add the
values(s) to the right of the bit number and set the register to this
sum. Note that changing the W command setting does not affect the value
set for this register.

BIT VALUE EXPLANATION
--- ----- -----------

0 1 Use speed of DTE-to-modem connection when reporting
DCE line speed (CARRIER message).

1 2 Append "/ARQ" to CONNECT result code when an
error-control connection is made

2 4 Enable CARRIER messages

3 8 Enable PROTOCOL messages

4 16 Enable AUTOSTREAM messages

5 32 Enable COMPRESSION messages

X.25 PAD REGISTERS:

The following registers are used only for X.25 packet switched calls.
Their values do not affect other connections.

REGISTER S53:

Global PAD configuration - defines a set of behavior switches that
control the X.25 PAD and all four virtual channels.

VALUE EXPLANATION
----- -----------

0 CCITT compatibility

1 CCITT compatibility; PAD prompt is an asterisk and is
preceded by the channel number (e.g.,1*)

2 Fixed user interface; PAD prompt is a hyphen

3 Fixed user interface; PAD prompt is a hyphen preceded by
the channel number (e.g.,1-)

4 Fixed control interface; PAD prompt is a hyphen

5 Fixed control interface; PAD prompt is a hyphen preceded
by the channel number

6 Fixed user and fixed control interface; PAD prompt is a
hyphen

7 Fixed user and fixed control interface; PAD prompt is a
hyphen preceded by the channel number

REGISTERS S74, S75:

Minimum incoming logical channel number - S74 (upper two decimal digits)
and S75 (lower two decimal digits) combine to specify the lowest incoming
logical channel number the packet layer will accept and report. The range
for S74 is 0-40 (in units of 100) with a factory setting of 0. The range
for S75 is 0-99 with a factory setting of 1. For example, setting S74=10
and S75=60 specifies 1060 as the lowest incoming logical channel number
the packet layer will accept and report.

REGISTERS S76, S77:

Maximum incoming logical channel number - S76 (upper two decimal digits)
and S77 (lower two decimal digits) combine to specify the highest
incoming logical channel number the packet layer will accept and report.
The range for S76 is 0-40 (in units of 100) with a factory setting of 40.
The range for S77 is 0-99 with a factory setting of 95. For example,
setting S76=40 abd /S77=90 specifies 4090 as the highest incoming logical
channel number the packet layer will accept and report.

REGISTERS S78,S79:

Outgoing logical channel number - S78 (upper two decimal digits) and S79
(lower two decimal digits) combine to specify the outgoing logical
channel number the packet layer will use to place a call. The range for
S78 is 0-40 (in units of 100) with a factory setting of 0. The range for
S79 is 0-99 with a factory setting of 16. For example, setting S78=30 and
S79=75 specifies 3075 as the outgoing logical channel number the packet
layer will use.

REGISTER S80:

Packet layer N20 parameter - sets the maximum number of times a restart
request can be retransmitted. The range is 0-255 with a factory setting
of 1.

REGISTER S81:

Packet layer T20 parameter - sets the maximum duration (in 10 second
increments) the transmitter waits for acknowledgement of a restart
request frame before initiating a recovery procedure. The range is 0-255
with a factory setting of 18 (180 seconds).

PAD COMMANDS FOR X.25 CONNECTIONS:

Although calls to an X.25 Packet Switched Network are placed using the D
command, once connected, calls are made from one of the modem's four
channels using a set of command instructions specific to CCITT triple-X
PADs. For descriptions of the commands used with X.25 connections, refer
to the V-series System Product User's Reference.

DTE INTERFACE CONNECTION:

Proper connections between the modem and the computer or other device on
which it is installed are mandatory for establishing connections and
maintaining data integrity during communications.

The chart below details the Data Terminal Equipment (DTE) interface
connector pin assignments and circuit descriptions of each signal for the
modem's DTE interface connection. Both the EIA (Electronic Industry of
American) and the CCITT V.24 standard nomenclature are provided. This
information should be used to determine the cabling requirements for your
application. If you are unable to purchase a cable meeting your needs,
contact Hayes Customer Service.

PIN EIA V.24 SIGNAL DIRECTION DESCRIPTION
--- --- ---- ---------------- -----------

1 AA 101 N/A Protective Ground

2 BA 103 To modem Transmit Data

3 BB 104 From modem Receive Data

4 CA 105 To modem Request To Send

5 CB 106 From modem Clear To Send

6 CC 107 From modem Data Set Ready

7 AB 102 N/A Signal Ground

8 CF 109 From modem Data Carrier Detect

12 CI 112 From modem Data Signal Rate

15 DB 114 From modem Transmitter Clock

17 DD 115 From modem Receiver Clock

20 CD 108.2 To modem Data Terminal Ready

22 CE 125 From modem Ring Indicator

23 CI 112 From modem Data Signal Rate

24 DA 113 To modem Transmitter Clock

NOTE: In a synchronous mode, pins 15,17, and 24 carry signal element
timing. In AutoSync mode, pin 22 carries an end-of-frame signal. Some
hardware and software monitor this circuit and pin 20 for modem control;
Hayes Smartcom products do not. When using RTS and CTS local flow
control, pin 4 and pin 5 must be supported.

EXPERIENCING DIFFICULTIES?

The following suggestions may answer your questions before you go to more
technically detailed sources such as the V-series System Product User's
Reference, or to your hardware manuals. Your first reference should
always be your software's manual as the software controls the operation
of the modem.

Check for proper use of communication signals:

Refer to your computer and software manuals to determine whether the
modem's response to signals needs to be adjusted with AT commands. For
example, the requirements for Data Terminal Ready and Carrier Detect
signaling (controlled by the &D2 and &C1 commands, respectively) vary
between communication environments. The way in which the computer and the
software use signals will determine how the modem should respond to or
control them.

Verify the appropriate communication standard:

The modem uses the B command options to select between various
communication standards (see the B command listing on this card and the
Installation Guide for communication standards supported by your modem).
Some remote systems require that a particular communication standard and
associated speed be selected.

Adjust modem's command response:

Some computer and software combinations do not react as expected when the
modem responds to commands and/or provides call progress monitoring with
result codes. Use the X,V,W, and Q commands to configure the modem's
responses to meet these needs.

Verify adequate use of local flow-control:

When using the modem in error-control mode (&Q5) or in asynchronous mode
with speed buffering (&Q6), some method of flow-control is necessary.
The method should be selected based on the capabilities of the software
and the requirements of the attached device (see the &K command
options).


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