

                                                                1995/2/14
                                                                BY UMC










        ==============================================================

                     UM92144  DATA/FAX/VOICE MODEM

                    AT COMMAND SET REFERENCE MANUAL

        ==============================================================



































PART  I : AT COMMAND SET
--------------------------------------------------------------------------------

A            Manually Answer ................................................  6
A/           Repeat the Last Command ........................................  6
AT           Attention Characters  ..........................................  6
B_           Bell or CCITT Mode .............................................  6
D_           Dialing ........................................................  6
DS = n       Dial one of three stored numbers ...............................  6
E_           Echo Commands ..................................................  6
+ + +        Escape Character ...............................................  6
H_           On-hook or Off-hook ............................................  6
I_           Identification .................................................  6
L_           Volume Control .................................................  7
M_           Speaker Control ................................................  7
N_           Automode Enable ................................................  7
O_           Data Mode ......................................................  7
Q_           Modem Responses ................................................  7
Sr?          Read Register Value ............................................  7
Sr = n       Set Register Value .............................................  7
V_           Digit or Word Responses ........................................  7
X_           Response Sets ..................................................  7
Y_           Break Signal ...................................................  7
Z_           Reset ..........................................................  7

&C_          Carrier Detected Signal ........................................  7
&D_          Data Terminal Ready Signal .....................................  7
&F           Obtain Modem Configuration from Memory .........................  8
&G_          Guard Tone .....................................................  8
&J_          Telephone Jack Type ............................................  8
&L_          Dial-up or Leased-Line Operation ...............................  8
&M_          Asynchronous of Synchronous Operation ..........................  8
&P_          Make/Break Ratio ...............................................  8
&R_          Clear To Send Signal ...........................................  8
&S_          Data Set Ready Option ..........................................  8
&T_          Testing ........................................................  9
&V           Display Configuration Profile ..................................  9
&W_          Store Active Configuration Profile .............................  9
&X_          Synchronous Clock Source .......................................  9
&Y_          Select the Active Configuration After Power-On or Reset.........  9
&Zn=         Store Telephone Numbers in Nonvolatile Memory ..................  9
*B_          Dial Backup ....................................................  9
*E_          Esc Mode option ................................................  9
*G_          Adaptive Handshake .............................................  9
*N_          Modem  Speed  Select   ......................................... 10
*P_          User Abort ..................................................... 10
*Q_          Retrain ........................................................ 10
*T_          Trellis Coding ................................................. 10
*X_          Output Level Adjustment ........................................ 10



                                        1


PART II  : V.42bis / MNP COMMAND SET
--------------------------------------------------------------------------------

%An          Auto-Reliable Fall Back Character .............................. 11
\A_          Block Size ..................................................... 11
\Bn          Line Break ..................................................... 11
%C_          Disable/Enable Data Compression Operation ...................... 11
\E_          Normal Mode Data Echo .......................................... 11
\G_          Disable/Enable DCE Flow Control ................................ 11
\J_          DTE Baud Rate Adjustment ....................................... 11
\K_          Set the Break Control .......................................... 11
\N_          Select Data Link Type .......................................... 11
\Q_          Flow Control ................................................... 12
\Tn          Set Inactive Timer ............................................. 12
\V_          MNP Extended Responses ......................................... 12
\X_          XON\XOFF Passthrough............................................ 12
W_           Disable/Enable V.42 Extended Responses ......................... 12
&K_          Flow Control ................................................... 12
&M_          Data Connection ................................................ 12

































                                        2


PART  III :  FAX MODE TR_29 CLASS 2 COMMAND SET
--------------------------------------------------------------------------------

AT+FCLASS = _   ............................................................. 13

+FAA=_
+FBOR=_
+FCFR
+FCON
+FCR=_
+FCSI:
+FDCS:
+FDCS=
+FDCC=_
+FDIS:
+FDIS=_
+FDR
+FDT
+FET:
+FET=_
+FHNG:
+FLID=_
+FMDL?
+FMFR?
+FPTS:
+FREV?
+FTSI:

























                                        3


PART  VI  :  VOICE MODE COMMAND SET  (ONLY FOR 92144EF)
--------------------------------------------------------------------------------

#BDR_  Select Baud Rate ..................................................... 14
#CLS_  Select Data,Fax or Voice Mode ........................................ 14
#MDL?  Identify Model ....................................................... 14
#MFR?  Identify Manufacturer................................................. 14
#REV?  Identify Revision..................................................... 14
#VBS_  Bits Per Sample ...................................................... 14
#VBT_  Beep Tone Timer ...................................................... 14
#VCI?  Identify Compression Method .......................................... 14
#VLS_  Voice Line Select .................................................... 14
#VRX   Voice Receive Mode ................................................... 14
#VTX   Voice Transmit Mode .................................................. 14

Register S30   Voice Inactivity Timer ....................................... 15




































                                        4


PART  V  :  V25.BIS  COMMAND  SET
--------------------------------------------------------------------------------

CRN_   Dialing .............................................................. 16
CRS_   Dial a stored number ................................................. 16
PRN_;_ Store dial number .................................................... 16
RLN    List the stored number ............................................... 16
DIC    Disregard incoming call .............................................. 16
CIC    Connect incoming call ................................................ 16
ATC    Toggle between V.25bis and AT command set ............................ 16


PART IV : S REGISTERS
--------------------------------------------------------------------------------

Register   S0           Auto Answer Ring .................................... 17
Register   S1           Count Incoming Rings ................................ 17
Register   S2           Value of the Escape Characters ...................... 17
Register   S3           Value of the Carriage Return Character .............. 17
Register   S4           Value of the Line Feed Character .................... 17
Register   S5           Value of the Backspace Character .................... 17
Register   S6           Dial Tone Wait Time ................................. 18
Register   S7           Remote Carrier Signal Wait Time ..................... 18
Register   S8           Pause Time for Comma ................................ 18
Register   S9           Carrier Detect Response Time ........................ 18
Register   S10          Carrier Loss To Hungup Time ......................... 19
Register   S11          Touch-Tone Dialing Duration ......................... 19
Register   S12          Escape Guard Time ................................... 19
Register   S14          Bit-mapped register ................................. 19
Register   S16          Modem tests ......................................... 20
Register   S18          Duration of Modem Tests ............................. 21
Register   S21          Bit-mapped register ................................. 21
Register   S22          Bit-mapped register ................................. 21
Register   S23          Bit-mapped register ................................. 22
Register   S25          Data Terninal Ready Delay ........................... 23
Register   S26          Request To Send-to-Clear To Send Delay .............. 23
Register   S27          Bit-mapped register ................................. 23

Register   S36          V.42 Negotiation Fallback ........................... 24
Register   S46          Protocol Selection .................................. 24
Register   S82          Break Handling ...................................... 24
Register   S95          Negotiation Message Options ......................... 25
Register   S96          Dial tone / busy tone detect range .................. 25
Register   S97          Energy detection throughold  ........................ 25








                                        5



                PART    I      :       AT   COMMAND   SET
                -----------------------------------------


Command         Function
------------------------------------------------------------------------
A               Manually answer incoming call

A/              Repeat last command executed.
                Do not precede A/ with AT or follow with ENTER.

AT              Appear at the beginning of every command line.

B_             *B0 = CCITT compatibility
                B1 = Bell 212A compatibility

D_              0 through 9
                # and *
                P ( pulse dialing)
                R ( include at end of Dial command line to call originate-only
                   modem )
                T ( Touch-Tone dialing )
                W ( Wait for second dial tone )
                @ ( Wait for one or more rings,followed by 5 seconds of silence)
                ,  ( Pause )
                !  ( Flash )
                ;  ( Return to command mode after dialing )

DS = n          Dials one of three telephone numbers (n) stored in the modem's
                nonvolatile memory.

E_              E0 = Command are not echoed
               *E1 = Command are echoed

+ + +           Switch from Data Mode to Command Mode;
                Pause one second before typing;
                Do not follow with carriage return ( see Register S2 and S12 ).

H_              H0 = Modem is on-hook ( hung up )
                H1 = Modem is off-hook

I_              I0 = Display product-identification code.
                I1 = Factory set
                I2 = Internal memory test
                I3 = Firmware version 1
                I4 = Firmware version 2





                                        6


L_              L0 = Low speaker volume
                L1 = Low speaker volume
               *L2 = Medium speaker volume
                L3 = Loud speaker volume

M_              M0 = Internal speaker off
               *M1 = Internal speaker on until carrier detected
                M2 = Internal speaker always on
                M3 = Speaker on until carrier detected and off while dialing

N_              N0 = Fixed data rate follow AT*N command
               *N1 = Adaptive data rate enable

O_              O0 = Return to Data Mode
                O1 = Return to Data Mode and initiate a retrain

Q_             *Q0 = Modem sends responses
                Q1 = Modem does not sends responses

Sr?             Read value in register r ( r = 0 to 97 )

Sr = n          Set register r to value n ( r = 0 to 97, n = 0 to 255 )

V_              V0 = Single digit responses
               *V1 = Word responses

X_              X0 = Hayes Smartmodem 300 compatibility
                X1 = Include CONNECT 1200 and CONNECT 2400 responses
                X2 = Include dial tone detection response
                X3 = Include busy signal detection response
               *X4 = Include both dial tone and busy signal detection responses

Y_             *Y0 = Modem does not send or respond to break signals
                Y1 = Modem sends break signals for 4 seconds before disconnect

Z_             *Z0 = Retrieves active configuration profile from stored
                     configuration profile 0.
                Z1 = Retrieves active configuration profile from stored
                     configuration profile 1.

&C              &C0 = Keep Carrier Detected Signal always ON
               *&C1 = Turn on Carrier Detected Signal when remote carrier signal
                      is present

&D              &D0 = Modem ignores the Data Terminal Ready signal
                &D1 = Modem returns to Command Mode and asynchronous operation
                      following an ON-to-OFF Data Terminal Ready transition
               *&D2 = Modem hangs up, returns to the Command Mode, and prepares
                      for asynchronous operation following an ON-to-OFF Data
                      Terminal Ready transition


                                        7


                &D3 = Modem resets following an ON-to-OFF Data Terminal Ready
                      transition

&F              Restores the modem to the default operating characteristics

&G_            *&G0 = Guard tone disabled
                &G1 = Guard tone disabled
                &G2 = 1800 Hz guard tone

&J_            *&J0 = Modem will use an RJ11, RJ41S, or RJ45S telephone jack
                &J1 = Modem will use an RJ12 or RJ13 telephone jack

&L_            *&L0 = Modem is setup for dialup operation
                &L1 = Modem is setup for 2-wire leased-line operation
                &L2 = Modem is setup for 4-wire leased-line operation

&M_            *&M0 = Modem is configured for asynchronous operation
                &M1 = Modem enters synchronous mode after dialing
                      asynchronously
                &M2 = Synchronous terminal support only. This command lets your
                      modem dial a stored telephone number automatically on the
                      OFF-TO-ON transition of DTR signal and enter the
                      synchronous data mode.
                &M3 = The call is manually initiated while DTR is OFF. The
                      handshake proceeds when DTR is ON.

&P_            *&P0 = United States setting for off-hook (make) to on-hook
                      (break) ratio
                &P1 = UK and Hong Kong setting for off-hook to on-hook ratio

&R_             &R0 = Modem turns on the Clear To Send signal when it detects
                      the Request To Send signal from attached computer or
                      terminal
                &R1 = Modem ignores the Request To Send signal and turns on its
                      Clear To Send signal when ready to receive data
                      synchronously
               *&R2 = Clear To Send force on

&S_            *&S0 = DSR force on
                &S1 = DSR to operate according to RS-232 specification












                                        8


&T_            *&T0 = Ends test in progress
                &T1 = Perform Local Analog Loopback Test
                &T3 = Perform Local Digital Loopback Test
                &T4 = Modem acknowledge Remote Digital Loopback Test performed
                      by a remote modem
                &T5 = Modem ignore a remote modem's request for a Remote Digital
                      Loopback Test
                &T6 = Perform Remote Digital Loopback Test
                &T7 = Perform Remote Digital Loopback Test and Self-Test
                &T8 = Perform Local Analog Loopback Test and Self-Test

&V              Displays the modem's active configuration profile,
                stored configuration profile 0 & configuration profile 1

&W_             &W0 = stores modem's active configuration profile in
                      configuration profile 0
                &W1 = stores modem's active configuration profile in
                      configuration profile 1

&X             *&X0 = Modem provides synchronous clock on EIA pin 15 and pin 17
                &X1 = Modem accepts an externally provided synchronous clock on
                      EIA pin 24 and provides it on EIA pin 15
                &X2 = Modem accepts an externally provided synchronous clock
                      from Carrier Detected signal being received and provides
                      the clock on EIA pin 15.

&Y_            *&Y0 = Designates configuration profile 0 to be the default
                      configuration profile. When the modem is turned on or is
                      reset,configuration profile 0 will be retrieved as the
                      active configuration profile.
                &Y1 = Designates configuration profile 1 to be the default
                      configuration profile. When the modem is turned on or is
                      reset,configuration profile 1 will be retrieved as the
                      active configuration profile.

&Zn=            Stores up to 3 telephone numbers in the modem's non-volatile
                memory. Use DS=n to dial the number


*B_            **B0 = Disable dial backup function
                *B1 = Dial a stored number automatically when disconnection
                      occurs in 4 wire leased line.

*E_             *E0 = Time dependent ESC mode
               **E1 = Time independent ESC mode

*G_             *G0 = disable adative handshake
               **G1 = enable adative handshake




                                        9


*N_             *N0 = Modem connect speed 1200bps
                *N1 = Modem connect speed 2400bps
                *N2 = Modem connect speed 4800bps
                *N3 = Modem connect speed 9600bps
                *N4 = Modem connect speed 7200bps
                *N5 = Modem connect speed 12000bps
               **N6 = Modem connect speed 14400bps
                *N7 = Modem connect V.23 1200/75bps speed

*P_            **P0 = Enable user abort feature
                *P1 = Disable user abort feature

*Q_             *Q0 = Retrain disable
               **Q1 = Retrain enable

*T_             *T0 = Turn off Trellis coding
               **T1 = Turn on Trellis coding

*X_             *X0 = Output level -2dBm
                *X1 = Output level -4dBm
                *X2 = Output level -6dBm
                *X3 = Output level -8dBm
                *X4 = Output level -10dBm
               **X5 = Output level -12dBm
                *X6 = Output level -14dBm



























                                       10



                   PART  II   :  V.42bis / MNP COMMAND SET
                   ---------------------------------------

Command         Function
--------------------------------------------------------------------------------
%An             Set auto-reliable fall back character to n ( n = 0 to 127 )

\A_             \A0 = 64-character maximum MNP block size
                \A1 = 128-character maximum MNP block size
                \A2 = 192-character maximum MNP block size
               *\A3 = 256-character maximum MNP block size

\Bn             Send a n/10 seconds line break to the modem ( n = 0 to 9 ).
                Default = 3

%C_             %C0 = Disable data compression operation
               *%C1 = Enable data compression operation

\E_            *\E0 = Do not echo data during a normal link
                \E1 = Echo data during a normal link

\G_            *\G0 = Disable DCE flow control during normal link
                \G1 = Enable DCE flow control during normal link (reserved)

\J_            *\J0 = Turn off DTE baud rate adjustment
                \J1 = Turn on DTE baud rate adjustment

\Kn             Sets the break control as follows :
                AT\Kn                   function
                ----------------------------------------------------------------
                n = 0, 2, 4  Enter the Command Mode, but do not send a Break to
                             remote modem ( To send a Break after use the \B
                             command ).
                n = 1        Empty data buffers and immediately send a Break
                n = 3        immediately send a Break.
               *n = 5        send a Break in sequence with any data received
                             from the port.

\N_             \N0 = Normal data link.
                \N1 = Direct data link.
                \N2 = MNP Reliable link only.
                \N3 = MNP Auto-reliable link
                \N4 = V.42 reliable link with phase detection
               *\N5 = V.42 auto-reliable link with phase detection.
                \N6 = V.42 reliable link without phase detection
                \N7 = V.42 auto-reliable link without phase detection.





                                        11


\Q_             \Q0 = Turn off flow control
                \Q1 = XON\XOFF software flow control
                \Q2 = CTS hardware flow control
               *\Q3 = RTS\CTS hardware flow control

\Tn             Inactivity timer; n minutes ( n = 0 to 90 )
                Default = 0

\V_             \V0 = Do not send MNP extended response
               *\V1 = Send MNP extended responses

\X_            *\X0 = Process XON\XOFF and don't pass through
                \X1 = Process XON\XOFF and pass through

W_              W0 = Disable V.42 extended responses
               *W1 = Enable V.42 extended responses

&K_             &K0 = Local flow control disable
               *&K3 = RTS\CTS hardware flow control
                &K4 = XON\XOFF software flow control
                &K5 = Transparent XON\XOFF software flow control

&M_             &M0 = Direct data link
               *&M5 = Instructs the modem to make a data connection using V.42
                      standard.



























                                        12


                PART  III :  FAX MODE TR-29 CLASS 2 COMMSND SET
                -----------------------------------------------

Command         Function
--------------------------------------------------------------------------------
+FCLASS = 0     Data mode operation
+FCLASS = 2     Fax mode operations

+FAA=_          Auto answer mode parameter

+FBOR=_         Phase C data bit order

+FCFR           Confirmation to receive prompt

+FCON           Facsimile connection response

+FCR=_          Capability to receive

+FCSI:          Report the called station ID response

+FDCS:          Report session parameters response

+FDCS=_         Current session parameter

+FDCC=_         DCE capabilities parameters

+FDIS:          Report remote capabilities response

+FDIS=_         Current session negotiation parameters

+FDR            Receive phase C data command

+FDT            Transmit phase C data command

+FET:           Post page message response

+FET=_          End the page or document command

+FHNG:          Call termination status response

+FLID=_         Local ID string parameter

+FMDL?          Request DCE model

+FMFR?          Request DCE manufacturer

+FPTS:          Page transfer status response

+FREV?          Request DCE revision

+FTSI:          Report remote station ID

                                        13


                PART  VI :  VOICE MODE COMMSND SET (only for 92144EF)
                -----------------------------------------------------

Command         Function
--------------------------------------------------------------------------------
#CLS_           #CLS?  Return the current setting of the #CLS command
               *#CLS=0 Select data mode operation
                #CLS=2 Select fax class 2 command operation
                #CLS=8 Select voice mode operation

#BDR_           #BDR?  Return the current setting of the #BDR command
               *#BDR=0 Enable autobaud detection
                #BDR=n Where n = 1,2,4,6,8,16,24 ,send OK message and switchs
                       to the new speed defined by n*2400 bps.

#MDL?           Identify the modem model

#MFR?           Identify the modem manufacturer

#REV?           Identify the modem revision

#VBS_           #VBS?  Return the current setting of the #VBS command
                #VBS=2 Selects 2 bits per sample ADPCM
                #VBS=3 Selects 3 bits per sample ADPCM
               *#VBS=4 Selects 4 bits per sample ADPCM

#VBT_           #VBT?  Return the current setting of the #VBT command
                #VBT=0 Disable the tone generation capability
                #VBT=n Where n = 1-40 10ths of a second,sets tone duration time

#VCI?           Identify the voice compression method

#VLS_           #VLS?  Return the current setting of the #VLS command
               *#VLS=0 The command instructs the telephone line interface should
                       be routed through the modem.
                #VLS=1 The command instructs the modem to route only the handset
                       through the modem.
                #VLS=2 The command instructs the modem to route only the speaker
                       through the modem.
                #VLS=3 The command instructs the modem that only the auxiliary
                       input device should be routed to modem. (reserved)
                #VLS=4 The command is the same as #VLS=0,except the modem enable
                       the internal speaker.

#VRX            Voice receive, this action command is only valid if the modem
                is in the online voice command mode, and is the switch to the
                voice receive mode.

#VTX            Voice transmit,this action command is only valid if the modem
                is in the online voice command mode, and is the switch to the
                voice transmit mode.

                                        14


Register S30:   Value of the voice inactivity timer

S30 = 0         Voice inactivity timer off (default)

S30 = 1 - 255   This is the period of time (in secs), which if expired causes
                the modem to hang up the telephone line if it is off_hook and
                no data has passed during the period. When there is an
                inactivity time out with #CLS=8, the modem always forces
                #CLS=0 and #BDR=0.











































                                        15



                PART  V   :     V25.BIS    COMMANDS    SET
                ------------------------------------------


Command         Function
-----------------------------------------------------------------------
CRN_            Dial a telephone number

CRS_            Dial a telephone number stored in non-volatile memory

PRN_;_          Store a phone number to non-volatile memory

RLN             Display the phone numbers stored in non-volatile memory

DIC             Disregard incoming call

CIC             Connect incoming call

ATC             Toggle between V25.bis and AT command set
































                                        16



                      PART   IV     :   S   REGISTERS
                      -------------------------------


Reglster S0 :   Auto Answer Ring

Assigning a value from 1 to 255 in Register S0 tells modem the number of rings
that must occur before it can automatically answer incoming calls.
The default value = 0 .


Reglster S1 :   Count Incoming Rings

The S1 register records the number of incoming rings when your telephone line
rings.


Reglster S2 :   Value of the Escape Characters

Register S2 sets the ASCII value of the escape characters.
The default value (decimal 43) is equivalent to the ASCII character '+'. You can
change this register to any value from 0 to 255.    Values greater than 127
disable the escape feature and prevent you from returning to the Command Mode.


Register S3 :   Value of the Carriage Return Character

Register S3 sets the ASCII value of the carriage return character(End-Of-Line).
The default valuc is 13,although you can change it to another ASCII value
between 0 and 127.


Register S4 :   Value of the Line Feed Character

Register S4 sets the ASCII value of the line feed character.  The default value
is 10,  although you can change it to another ASCII value between 0 and 127.
If you do not want to receive a line feed character ,  you can change the value
in this register to a null character ,  but you cannot disable line feed
characters.


Register S5 :   Value of the Backspace Character

Register S5 sets the ASCII value of backspace character.   This character  is
both the character created by pressing BACKSPACE key and the character echoed to
move the cursor to the left.
The default value is 8, although you can change it to another ASCII value
between 0 and 32,or 127.
Note:Do not set the value of the backspace character between 33 and 126.


                                        17


Register S6 :   Dial Tone Wait Time

Register S6 sets the time to wait after going off-hook before dialing the first
digit in a Dial command when using the X0, X1 or X3 responses.
The default time is 2 seconds, although you can change it to another value
between 2 and 255 seconds.  This feature is convenient when it takes longer
than 2 seconds to obtain a dial tone.


Register S7 :   Remote Carrier Signal Wait Time

Register S7 decides how many seconds to wait for a remote modem's carricr signal
before hanging up.   The default value is 45 seconds, although you can change
it to a value between 1 and 255 seconds, if the modem does not detect a carrier
with in the specified time.
Register S7 also controls the time-out of the W command.


Register S8 :   Pause Time for Comma

Register S8 decides how many seconds to pause for each comma ( , ) it encounters
in a Dial command line.  You usually use the commma when dialing through a  PBX
or other special telephone service to wait for an outside telephone line.
The default value is 2 seconds , although you can change it to a value between 0
and 255 seconds.
An alternative to changing this register is to include more than one comma in
your command line.


Register S9 :   Carrier Detect Response Time

Register S9 sets the time the remote modem's carrier signal must be present for
the modem to recognize it.  This feature ensures that your modem does not
mistake a busy signal, ring, or voice for the carrier signal.
The value of this register is in tenths of a second. The default value is 600 ms
, although you can change it from 1 to 255. For example, entering a value 13
means that the remote modem's carrier signal must be present for 1.3 seconds
for the modem to recognize it. Setting this value higher increases the chances
the modem will not mistakenly identify the carrier signal.













                                        18


Register S10 :   Carrier Loss Time

Register S10 sets the time between the loss of a remote  modem's  carrier signal
and when the modem disconnects. This allows the remote modem's carrier signal
to momentarily disappear from the telephone line without your modem disconnect.
The value of this register is in tenths of a second. The default value is 1.4
seconds,although you can change it from 1 to 255. You may want to set this value
higher if you have a noisy telephone line that might interfere with the
remote modem's carrier signal. If you want your modem to ignore the  Carrier
Detect status and act as if the remote modem's carrier signal is always
present, set the value to 255.


Register S11 :   Touch-Tone Dialer Speed

Register S11 controls the speed of the Touch-Tone (DTMF) dialing. Although you
can change the value from 50 to 255 ms,the default value will be 95 ms which
sets a dialing rate of 5.26 digits per second.
You should not select a value less than 50 ms. Increasing the value to 255 slows
the dialing rate to 1.9 digits per second.
Note  : Register S11 han no effect on pulse dialing, which is fixed at 10 pulses
per second.


Register S12 :   Escape Guard Time

Register S12 controls the escape guard time ( i.e. the time delay required
before and after you enter the escape characters). The guard time prevents your
modem from misinterpreting the escape characters as data.
This value is designated in measurements of 20 ms.
The default value is 50 ( which is equivalent to one second), although you can
change it to between 0 (0 seconds) to 255 (5.1 seconds).


Register S14 :   Bit-mapped Registersts

Bit-mapped registersts S14 lets you control modem echo, responses, dialing
method, and the originate or answer mode.

  Bit           Function
-------------------------------------------------------
  0 =           Undefined

  1 =  0        Do not echo command (E0)
       1        Echo command (E1) --default







                                        19


  2 =  0        Responses appear (Q0) --default
       1        Responses do not appear (Q1)

  3 =  0        Responses appear as single digit (V0)
       1        Responses appear as words (V1) --default

  4 =           Undefined

  5 =  0        Use touch-tone dialing method (T) --default
       1        Use pulse dialing method (P)

  6 =           Undefined

  7 =  0        Answer incoming calls (A)
       1        Originate calls (D) --default


Register S16 :   Modem Tests

Bit-mapped registersts S16 display the modem tests status.

  Bit           Function
-------------------------------------------------------
  0 =  0        Local analog loopback test off (&T0) --default
       1        Local analog loopback test on (&T1)

  1 =           Undefined

  2 =  0        Local digital loopback test off (&T0) --default
       1        Local digital loopback test on (&T3)

  3 =  0        modem not in remote digital loopback test started by remote
                modem (&T0) --default
       1        modem in remote digital loopback test started by remote modem
                (&T4).

  4 =  0        Do not perform remote digital loopback test (&T0) --default
       1        Perform remote digital loopback test (&T6)

  5 =  0        Do not perform remote digital loopback test and self test (&T0)
                --default
       1        Perform remote digital loopback test and self test (&T7)

  6 =  0        Do not perform local analog loopback test and self test (&T0) --
                default
       1        Perform local analog loopback test and self test (&T8)

  7 =           Undefined




                                        20


Register S18 :   Duration of Modem Tests

Register S18 sets the amount of time for the modem tests.    The tests can run
from 1 to 255 seconds, depending on the value in this register.
This register have a default value of 0, which turns off the timer.


Register S21 :   Bit-mapped Registersts

Bit-mapped registersts S21 lets you control the jack type and certain data
communication control singals.

  Bit           Function
-------------------------------------------------------
  0 =  0        RJ-11, RJ-41S, RJ-45S jack type (&J0) --default
       1        RJ-12, RJ-13 jack type (&J1)

  1 =           Undefined

  2 =  0        CTS follow RTS (&R0)  --default
       1        CTS on when ready to receive data synchronously (&R1)

  3,4= 0        modem ignores the DTR singal (&D0)
       1        modem enters command mode after ON-to-OFF DTR transition (&D1)
       2        modem hungs up after ON-to-OFF DTR transition (&D2) --default
       3        modem resets after ON-to-OFF DTR transition (&D3)

  5 =  0        CD singal always on (&C0)
       1        CD singal on when a remote carrier singal is present (&C1) --
                default

  6 =           Undefined

  7 =  0        Long space disconnect turned off (Y0) --default
       1        Long space disconnect turned on (Y1)


Register S22 :   Bit-mapped Registersts

Bit-mapped registersts S22 lets you control internal speaker and the responses
it returns.

  Bit           Function
-------------------------------------------------------
  0,1= 0        Low speaker volume (L0)
       1        Low speaker volume (L1)
       2        Medium speaker volume (L2) --default
       3        Loud speaker volume (L3)




                                        21


  2,3= 0        Speaker off (M0)
       1        Speaker on until carrier detected (M1) --default
       2        Speaker always on (M2)
       3        Speaker on until carrier detected but off during dialing (M3)

4,5,6= 0        Hayes smartmodem compatibility (X0)
       4        Include CONNECT XXX responses (X1))
       5        Same as 4 plus dial tone detection (X2)
       6        Same as 4 plus BUSY response and blind dialing (X3)
       7        Same as 6 plus dial tone detection (X4) --default

  7 =  0        US make/break ratio (&P0) --default
       1        UK and Hong Kong make/break ratio (&P1)



Register S23 :   Bit-mapped Registersts

  Bit           Function
-------------------------------------------------------
  0 =  0        Do not acknowledge remote modem request for digital loopback
                test (&T5)
       1        Acknowledge remote modem request for digital loopback test (&T4)
                --default

1,2,3= 0        Use 0-300bps data rate (AT)
       2        Use 1200bps data rate (AT)
       3        Use 2400bps data rate (AT)
       4        Use 4800bps data rate (AT)
       5        Use 9600bps data rate (AT)
       6        Use 19200bps data rate (AT)
       7        Use 38400bps or upper data rate (AT)

  4,5= 0        Use even parity (AT)
       1        Use space parity (AT)
       2        Use odd parity (AT)
       3        Use mark or none parity (AT)

  6,7= 0        Turn off guard tone (&G0) --default
       1        Turn off guard tone (&G1)
       2        Use 1800 HZ guard tone (&G2)











                                        22


Register S25 :   Data Terminal Ready Delay

When Modem is on-line,it will ignore a Data Terminal Ready signal lasting less
than the value of this register.  In this mode, the values for this register are
0 to 255 in hundredths of a second,and the default value is 0.05 seconds.
If you will be entering synchronous mode after dialing asychronously, this
register determines  how long the modem  waits before looking for the Data
Terminal Ready signal.This lets you detach the asynchronous terminal and connect
a synchronous terminal while remaining in the Data Mode. In this mode,the values
for this register are from 0 to 255 seconds and the default value is 5 seconds.


Register S26 :   Request To Send-to-Clear To Send Delay

This register affects synchronous operation only and applies only when you are
using the &R0 command.    This register determines how long the modem waits
to turn on the Clear To Send signal after a Request To Send OFF-to-ON transition
.
The default value is 1 ,  although this register accepts values from 0 to 2550
ms in 10 ms increments.


Register S27 :   Bit-mapped Registersts

Bit-mapped registersts S27 lets you control modem transmission mode and line
type.

  Bit           Function
-------------------------------------------------------
  0,1= 0        Use asynchronous operation (&M0) --default
       1        Enter synchronous mode after dialing asynchronously (&M1)
       2        Synchronous terminal support (&M2)
       3        Manually originating a synchronous call (&M3)

  2 =  0        Dialup line (&L0) --default
       1        2W Leased line (&L1)

  3 =           Undefined

  4,5= 0        Internal clock (&X0) --default
       1        External clock (&X1)
       2        Slave mode (&X2)
       3        Not used

  6 =  0        CCITT compatible mode (B0) --default
       1        Bell mode (B1)

  7 =           Undefined




                                        23


Register S36 :   V.42 negotiation fallback.

Register S36 defines the type of connection attempted by the modem and the
action to take if the attempt fails :

Bit         Value  Function
--------------------------------------------------------------------------------
2,1,0 =     0      Modem hangs up
            1      Same as 5
            2      Reserved
            3      Same as 7
            4      Modem tries to connect using V.42 Alternative Protocol
                   (compatible with MNP levels 2 - 5 ). If handshaking fails,
                   modem hangs up.
            5      Modem tries to connect using V.42 Alternative Protocol
                   (compatible with MNP levels 2 - 5 ). If handshaking fails,
                   modem tries to connect using a standard asynchronous
                   connection .
            6      Reserved
            7      Modem tries to connect using V.42 Alternative Protocol
                   (compatible with MNP levels 2 - 5 ). If handshaking fails,
                   modem tries to connect using a standard asynchronous
                   connection and automatic speed buffering -- default.


Register S46 :   Protocol selection

Register S46 defines the protocol selections specified for future negotiation.

Value    Function
------------------------------------------------------------------------
 136     LAP-M only.
 138     LAP-M with adaptive data compression -- default.


Register S82 :   Break handling

Register S82 specifies the break signal method used during V.42 applications.
The break type to be used depends on the user application.

Value    Function
------------------------------------------------------------------
 3       Expedited break signaling, regardless of its sequence in data sent and
         received by each modem.   Data integrity maintained both ahead of and
         after the break.
 7       Destructive break signalling, regardless of its sequence in data sent
         and received by each modem.Data being processed by each modem at time
         of break is discarded.




                                        24


 128     In sequence break signalling as data is sent and received. Data
         integrity is maintained both ahead of and after the break. --default



Register S95 :   Negotiation message options


Register S96 :   Dial tone/busy tone detect range select

        VALUE         RANGE ( Hz )            COUNTRY
-------------------------------------------------------------------
         0               350 - 620            USA, KOREA, TAIWAN --default
         1               425 - 450            BELGIUM
         2               440 - 700            FRANCE
         3               350 - 450            ISRAEL, JAPAN
         4               375 - 475            ITALY, NORWAY, GERMANY, DENMARK
         5               150 - 450            NETHERLANDS
         6               270 - 320            SINGAPORE
         7               350 - 500            SWEDEN
         8               375 - 550            SWITZERLAND
         9               350 - 440            U.K.
         10              110 - 700            FULL  RANGE


Register S97 :   Energy detection threshold

This register can use in CPM mode, for dial tone detect threshold.
The default value is 48.























                                        25
