Zoltrix AT Command Manual For Zoltrix K56Flex & V.90 Models
Rev 2.0 9/9/1998

K56Flex 56,000/V.34 33,600 (K56 Flex, V.34, V.32bis, V.42bis, MNP2-5,10, Caller ID, Flash ROM)

MODELS:
FMVSP56i         Internal K56Flex or V.90 Speaker Phone Fax/Modem (14,400 Fax/56,000 Modem)
FMVSP56i2       Internal K56Flex or V.90 Speaker Phone Fax/Modem (14,400 Fax/56,000 Modem)
FMVSP56i3       Internal Dual Mode V.90 and K56Flex Speaker Phone Fax/Modem (14,400 Fax/56,000 Modem)
FMVSP56e        External K56Flex or V.90 Speaker Phone Fax/Modem (14,400 Fax/56,000 Modem)

FMVSP56e3      External Dual Mode V.90 and K56Flex Speaker Phone Fax/Modem (14,400 Fax/56,000 Modem)

The commands listed in this document are for Zoltrix Modems based on Rockwell International's RCV56ACx chipset.
To determine if your modem uses this chipset send the following command from the "Terminal Mode" of a communication program:

            ATI6 [ENTER]

This document is intended for your modem if your Modem responds with something similar to the following:

            RCV56DPF L8570A Rev 30.0/30.0

AT Command Format

With the single exception of the A/ command, all commands to the modem begin with the characters AT, and end with a carriage return character, hence the name AT commands. The general format of an AT command is: AT<command string> where <command string> represents zero or more commands described in this manual. The <command string> can be null, resulting in the simple sequence "AT". This sequence, often called the attention command, is useful for checking that communication is established between an application program and the modem. The response to the AT command is always OK, providing positive indication of proper operation. It may be useful to issue the AT command several times, with a brief pause (100 ms. or so) between commands, until the OK response is received. Since the AT command string has no other effect except to elicit the OK response, it can be used whenever the modem is in command mode. The AT portion of an AT command can be in upper case or lower case, but not mixed case, thus AT or at, but not At or aT". The <command string> portion is independent of case. The <command string> may contain space characters, which are ignored.

Your Zoltrix MODEM has been pre-set at the factory for optimum performance.
All defaults are set to allow the modem to negotiate the best possible connection with highest quality, data compression, and error correction.

DEFAULT INIT STRING

The Default INIT string used at the factory and stored into the modem is as follows:

            AT&F&C1&D2

Because the modem was initialized at the factory, you could use an initialization (INIT) string of:

            ATZ

Note:   This command resets the modem to the stored settings. If the settings have been changed by software or manually, this INIT string may not work correctly.

You could change the INIT string in all of your software packages to either of the two previous examples. The first example is the best to use because some software may change the values stored in the modem.

If you want to custom configure your stored profiles, we suggest that you always start out with an AT&F&C1&D2 before customizing other commands. This string will reset the modem to the factory defaults as well as reset some other basic settings.

If modem performance suffers after modifying settings, send the INIT string above (AT&F&C1&D2) to the modem.

PERFORMANCE ISSUES

To get optimum performance from your Zoltrix MODEM, the phone line quality over which you are transmitting and receiving must be reliable and relatively free of "noise". If you have very noisy lines you may be able to get a good connection by forcing the modem to connect at a lower speed. Refer to the +MS command and Limiting the Modems Top Speed for information on controlling the modems speed.

LIMITING THE MODEMS TOP SPEED

If you experience problems connecting to slower modems (2400 or 1200bps), you may need to instruct your modem to limit the top speed to attempt. You may also need to limit the top speed the modem attempts to something less than 33,600bps, even when calling another 33,600 modem, because of the line noise in your area. If you don't, you may experience "garbage" or a "NO CARRIER" message.
This should not be necessary in most cases, but, there are some 2400bps and 1200bps or even 9600bps modems you may not connect to without using one of the following methods:
 

• 1. Use the +MS= command. AT+MS=11,1,19200,24000 will set the modem to use V.34 modulation, automode detection, with 19,200bps as the lowest connection rate acceptable, and 24,400 as the highest connection rate attempted.

  AT+MS=11,1,2400,24000 will set the modem to use V.34 modulation, automode detection, with 2,400bps as the lowest connection rate acceptable, and 24,000 as the highest connection rate attempted.

  Note: See the +MS= command for more details and examples.

• 2. Use the combination of the N0 command along with setting S37 to the proper value to limit the modems connection speed attempted.
• 3.    Use the N0 command and set your software to the connection rate desired.

  Note: This is not the desired method to use if you are making an error-correction connection with compression! The softwares "BAUD" rate should be at least twice, and preferably four, times the Carrier rate established. Otherwise you will get no benifits from the compression. Transfers will actually be slower than if a non-compression connection was established. You also cannot set software to all the connection rates that are supported by the 56K modem.

CUSTOM INIT STRINGS WITH DESCRIPTIONS OF MODEM CONFIGURATIONS
 

1) V.42bis Auto

    Init String: AT&F&C1&D2W2

This configuration should be the only configuration required to make all possible connections. The Modem will first attempt a V.42bis connection, if the remote Modem does not support V.42bis, the Zoltrix Modem will attempt an MNP5 connection, if the remote Modem does not support MNP5 the Zoltrix Modem will attempt an NORMAL connection (No error correction or compression). Because some Modems do not recognize the V.42bis handshaking sequence or you may want to make a special type of connection, we have added 5 possible connections types to ensure that the Zoltrix Modem will make a successful connection with all Modems.

2) V.42/MNP4 Auto

    Init String: AT&F&C1&D2W2S46=136%C0

This configuration is the same as V.42bis Auto except that all compression is turned off (V.42bis and MNP5 disabled).

3)  MNP5

    Init String: AT&F&C1&D2W2S48=128

This configuration will bypass the V.42bis and V.42 negotiation and attempt MNP5 first. If the remote Modem does not support MNP5 the Zoltrix Modem will attempt an NORMAL connection (No error correction or compression).

Use this selection if you know that the remote Modem is only a MNP Modem and does not support V.42/V.42bis.

4) MNP4

    Init String: AT&F&C1&D2W2S48=128%C0

This configuration will bypass the V.42bis and V.42 negotiation and attempt MNP4 first. If the remote Modem does not support MNP4 the Zoltrix Modem will attempt an NORMAL connection (No error correction or compression). Use this selection if you know that the remote Modem is only a MNP Modem and does not support V.42/V.42bis. This selection turns off the MNP5 compression. MNP5 may actually slow down file transfers of compressed files, therefore you may want to turn MNP5 off but still want the error correction capabilities of MNP4.

5) NORMAL

    Init String: AT&F&C1&D2&Q6W2

This configuration will not attempt V.42 or MNP but instead attempt a NORMAL connection. If you know that the remote Modem does not support V.42 or MNP, select this configuration type. This will actually speed up

the hand-shaking process. Many non-error-correcting modems do not intepret the V.42 and MNP signals correctly. Using this selection will eliminate the problems seen when calling non-error-correcting modems.

Note:  You may add additional commands to any of the preceding INIT strings, but it is recommended that you put the additional commands at the end of the INIT string.

Command

Function

Data carrier detect (DCD) signal

&Dn

DTR Option

This command interprets the ON to OFF transition of the DTR signal from the DTE in accordance with the parameter supplied.

&D0

DTR drop is interpreted according to the current &Qn setting as follows:

&Q0, &Q5, &Q6 DTR is ignored (assumed ON). 
Allows operation with DTEs which do not provide DTR. 
&Q1, &Q4 DTR drop causes the modem to hang up. Auto-answer is not affected. 
&Q2, &Q3 DTR drop causes the modem to hang up. Auto-answer is inhibited.

&D1

DTR drop is interpreted according to the current &Qn setting as follows:

&Q0, &Q1, &Q4, &Q5, &Q6 DTR drop is interpreted by the modem as if the asynchronous escape sequence had been entered. The modem returns to asynchronous command state without disconnecting. 
&Q2, &Q3 DTR drop causes the modem to hang up. Auto-answer is inhibited.

&D2

DTR drop is interpreted according to the current &Qn setting as follows:

&Q0 through &Q6 DTR drop causes the modem to hang up. Auto-answer is inhibited.

&D3

DTR drop is interpreted according to the current &Qn setting as follows:

&Q0, &Q1, &Q4, &Q5, &Q6 DTR drop causes the modem to perform a soft reset as if the Z command were received. The &Y setting determines which profile is loaded. 
&Q2, &Q3 DTR drop causes the modem to hang up. Auto-answer is inhibited.

&F

Restore Factory Configuration (Profile)

&F0

&F1

&Gn

Select Guard Tone

&G1

Disables guard tone.

&Jn

Telephone Jack Control

This command is included only for compatibility and performs no function except to load the S-Register.

&K0

&K3

&K4

&K5

&K6

&Ln

Leased Line Operation

This command requests leased line or dial-up operation. This command is provided for compatibility only; no mode change is performed, dial-up operation continues. The OK response is returned for a valid parameter, but no other action is performed.

&L0

Requests dial-up operation. Dial-up operation continues.

&Pn

Select Pulse Dial Make/Break Ratio

This command determines the make/break ratio used during pulse dialing.

&P0

Selects 39%-61% make/break ratio at 10 pulses per second.

&P1

Selects 33%-67% make/break ratio at 10 pulses per second.

&P2

Selects 39%-61% make/break ratio at 20 pulses per second.

&P3

Selects 33%-67% make/break ratio at 20 pulses per second.

&Qn

Sync/Async Mode

This command is an extension of the &Mn command and is used to control the connection modes permitted. It is used in conjunction with S36 and S48. (Also, see \N.)

NOTE: When the &Q0 to &Q4 command is issued to select the mode, the subsequent connect message will report the DCE speed regardless of the W command and S95 settings.

&Q2

Selects synchronous connect mode with async off-line command mode and enables DTR dialing of directory 0. See &M2.

(Serial interface operation only using a External modem.)

&Q3

Selects synchronous connect mode with async off-line command mode and enables DTR to act as Talk/Data switch. See &M3.

(Serial interface operation only using a External modem.)

&Q4

Selects AutoSync operation.

AutoSync operation, when used in conjunction with the Hayes Synchronous Interface (HSI) capability in the DTE, provides synchronous communication capability from an asynchronous terminal. 

Starting AutoSync. Set registers S19, S20, and S25 to the desired values before selecting AutoSync operation with &Q4. After the CONNECT message is issued, the modem waits the period of time specified by S25 before examining DTR. If DTR is on, the modem enters the synchronous operating state; if DTR is off, the modem terminates the line connection and returns to the asynchronous command state. 

Stopping AutoSync. AutoSync operation is stopped upon loss of carrier or the on-to-off transition of DTR. Loss of carrier will cause the modem to return to the asynchronous command state. An on-to-off transition of DTR will cause the modem to return to the asynchronous command state and either not terminate the line connection (&D1 active) or terminate the line connection (any other &Dn command active).

&Q5

The modem will try to negotiate an error-corrected link. The modem can be configured using S36 to determine whether a failure will result in the modem returning on-hook or will result in fallback to an asynchronous connection.

&Q6

&Rn

RTS/CTS Option

This selects how the modem controls CTS. CTS operation is modified if hardware flow control is selected (see &Kn command).

&R0

In sync mode, CTS tracks the state of RTS; the RTS-to-CTS delay is defined by S26. In async mode, CTS is normally ON and will turn OFF only if required by flow control.

&R1

In sync mode, CTS is always ON (RTS transitions are ignored). tracks the state of RTS; In async mode, CTS is normally ON and will turn OFF only if required by flow control.

&Sn

DSR Override

This command selects how the modem will control DSR.

&S0

DSR will remain ON at all times.

&S1

DSR will become active after answer tone has been detected and inactive after the carrier has been lost.

&Tn

&T0

&T1

Initiates local analog loopback, V.54 Loop 3. If a connection exists when this command is issued, the modem hangs up. The CONNECT XXXX message is displayed upon the start of the test.

&T2

&T3

Initiates local digital loopback, V.54 Loop 2. If no connection exists, ERROR is returned.

&T4

&T5

Disables digital loopback acknowledgment for remote request, i.e., an RDL request from a remote modem is denied.

&T6

Requests a remote digital loopback (RDL), V.54 Loop 2, without self test. If no connection exists, ERROR is returned. The CONNECT XXXX message is displayed upon the start of the test.

&T7

Requests a remote digital loopback (RDL),V.54 Loop 2, with self test. (In self test, a test pattern is looped back and checked by the modem.) If no connection exists, ERROR is returned. When the test is terminated either via expiration of S18, or via the &T0 or H command, the number of detected errors is reported to the DTE.

&T8

Initiates local analog loopback, V.54 Loop 3, with self test. (In self test, a test pattern is looped back and checked by the modem.) If a connection exists, the modem hangs up before the test is initiated. When the test is terminated either via expiration of S18, or via the &T0 or H command, the number of detected errors is reported to the DTE. This command may not be available in some countries due to PTT restrictions.

&V

Display Current Configuration and Stored Profiles

Reports the current (active) configuration, the stored (user) profiles, and the first four stored telephone numbers. The stored profiles and telephone numbers are not displayed if the NVRAM is not installed or is not operational as detected by the NVRAM test during reset processing.

Example:

AT&V

ACTIVE PROFILE: 
B0 E1 L1 M1 N1 QO T V1 W0 X4 Y0 &C0 &D0 &G2 &J0 &K3 &Q5 &R1 &S0 &T4 &X0 &Y0 
S00:002 S01:000 S02:043 S03:013 S04:010 S05:008 S06:002 S07:030 S08:002 S09:006 
S10:014 S11:255 S12:050 S18:000 S25:005 S26:001 S36:007 S37:000 S38:020 S46:138 
S48:007 S95:000 
STORED PROFILE 0: 
B0 E1 L1 M1 N1 QO T V1 W0 X4 Y0 &C0 &D0 &G2 &J0 &K3 &Q5 &R1 &S0 &T4 &X0 
S00:002 S02:043 S06:002 S07:030 S08:002 S09:006 S10:014 S11:095 S12:050 S18:000 
S36:007 S37:000 S40:105 S41:003 S46:138 S95:000 
STORED PROFILE 1: 
B0 E1 L1 M1 N1 QO T V1 W0 X4 Y0 &C0 &D0 &G2 &J0 &K3 &Q5 &R1 &S0 &T4 &X0 
S00:002 S02:043 S06:002 S07:030 S08:002 S09:006 S10:014 S11:095 S12:050 S18:000 
S36:007 S37:000 S40:105 S41:003 S46:138 S95:000 
TELEPHONE NUMBERS: 
0 = 1 = 
2 = 3 = 
OK

&V1

&Wn

Store Current Configuration

Saves the current (active) configuration (profile), including S-Registers, in one of the two user profiles in NVRAM as denoted by the parameter value. This command will yield an ERROR message if the NVRAM is not installed or is not operational as detected by the NVRAM test.

The current configuration is comprised of a list of storable parameters illustrated in the &V command. These settings are restored to the active configuration upon receiving an Zn command or at power up (see &Yn command).

&W0

Store the current configuration as profile 0.

&W1

Store the current configuration as profile 1.

&Xn

&X0

&X1

&X2

&Yn

Designate a Default Reset Profile

Selects which user profile will be used after a hard reset.

&Y0

The modem will use profile 0.

&Y1

The modem will use profile 1.

&Zn=x

Store Telephone Number

The modem can store up to four telephone numbers and each telephone number dial string can contain up to 34 digits.

&Zn=x n = 0 to 3 and x = dial string.

Command

Function

Enable/Disable Line Quality Monitor and Auto-Retrain or Fallback/Fall Forward

Controls whether or not the modem will automatically monitor the line quality and request a retrain (%E1) or fall back when line quality is insufficient or fall forward when line quality is sufficient (%E2). If enabled, the modem attempts to retrain for a maximum of 30 seconds.

%E2

Enable line quality monitor and fallback/fall forward.

Fallback/Fall Forward. When %E2 is active, the modem monitors the line quality (EQM). When line quality is insufficient, the

modem will initiate a rate renegotiation to a lower speed within the V.34/V.32 bis/V.32 (RC336) modulation speeds. The 
modem will keep falling back within the current modulation if necessary until the speed reaches 2400 bps (V.34) or 4800 bps 
(V.32). Below this rate, the modem will only do retrains if EQM thresholds are exceeded. If the EQM is sufficient for at least 
one minute, the modem will initiate a rate renegotiation to a higher speed within the current modulation speeds. The rate 
renegotiations will be done without a retrain if a V.32 bis connection is established. 
Speeds attempted during fallback/fall forward are those shown to be available in the rate sequences exchanged during the 
initial connection. Fallback/fall forward is available in error correction and normal modes, but not in direct mode or 
synchronous mode with external clocks.

Fallback/Fall Forward.

When %E2 is active, the modem monitors the line quality (EQM). When line quality is insufficient, the modem will initiate a rate renegotiation to a lower speed within the V.34/V.32 bis/V.32 (RC288) or V.32 bis/V.32 (RC144) modulation speeds. The modem will keep falling back within the current modulation if necessary until the speed reaches 2400 bps (V.34) or 4800 bps (V.32). Below this rate, the modem will only do retrains if EQM thresholds are exceeded. If the EQM is sufficient for at least one minute, the modem will initiate a rate renegotiation to a higher speed within the current modulation speeds. The rate renegotiations will be done without a retrain if a V.32 bis connection is established.

Speeds attempted during fallback/fall forward are those shown to be available in the rate sequences exchanged during the initial connection. Fallback/fall forward is available in error correction and normal modes, but not in direct mode or synchronous mode with external clocks.

%L

%Q

Example: 

AT%Q 
015

Command

Function

Operating Mode

This command controls the preferred error correcting mode to be negotiated in a subsequent data connection.

\N2

Selects reliable (error-correction) mode. The modem will first attempt a LAPM connection and then an MNP connection. Failure to make a reliable connection results in the modem hanging up.

(Forces &Q5, S36=4, and S48=7.)

\N3

\N4

\N5

\Vn

\V0

Connect messages are controlled by the command settings Xn, Wn, and S95.

\V1

When single line connect messages are enabled, there are no CARRIER, PROTOCOL, or COMPRESSION messages apart from the fields described below.

The single line connect message format is: 
CONNECT <DTE Speed></Modulation></Protocol></Compression></Line Speed>/<Voice and Data> 

Where:

<DTE Speed =

DTE speed, e.g., 57600.

Protocol =

“NONE” for no protocol.

“ALT” for Microcom Network Protocol.

“LAPM” for LAP-M protocol.

Line Speed =

Command

Function

+MS= <mod> [,[<automode>][, [<min_rate>][, [<max_rate>][, [<x_law>][, [<reserved>], [<max_TX_rate>]]]]]]<]]]]]]<CR> 
 

Notes: 

• 1. For 14400 bps and lower speeds, the Nn command and S37 register can alternatively be used, in which case the +MS subparameters will be modified to reflect the Nn and S37=x settings. Use of the Nn and S37=x commands is not recommended but is provided for compatibility with existing communication software. (S37 is not updated by the +MS command.)
• 2. Subparameters not entered (enter a comma only or <CR> to skip the last subparameter) remain at their current values.

Reporting Selected Options 
The modem can send a string of information to the DTE consisting of selected options using the following command: 

+MS?

The response is: 

+MS: <mod>, <automode>, <min_rate>, <max_rate>, <x_law>, <reserved>, <max_TX_rate>

For example, 

+MS: 12,1,300,56000,0,0,33600 [default for RC56 with V.90 only loaded or V.90/K56Flex] 
+MS: 56,1,300,56000,0,0,33600 [default for RC56 with K56Flex only loaded]

Reporting Supported Options 
The modem can send a string of information to the DTE consisting of supported options using the following command: 

+MS=?

The response is: 

+MS: (list of supported <mod> values), (list of supported <automode> values),(list of supported <min_rate> values), (list of supported <max_rate> values), (list of supported <x_law> values), (list of supported <reserved> values), (list of supported <max_tx_rate> values)

For example, 

+MS: (0,1,2,3,9,10,11,12,56,64,69), (0,1), (300-33600), (300-56000), (0,1), (0,1), (300-33600) [V.90/K56flex loaded]] 
+MS: (0,1,2,3,9,10,11,12,64,69), (0,1), (300-33600), (300-56000), (0,1), (0,1), (300-33600) [V.90 only loaded]] 
+MS: (0,1,2,3,9,10,11,56,64,69), (0,1), (300-33600), (300-56000), (0,1), (0,1), (300-33600) [K56flex only loaded]] 
+MS: (0,1,2,3,9,10,11,64,69), (0,1), (300-33600), (300-33600), (0,1), (0,1) [RC336 default values] 

<mod>

Modulation

Possible Rates(bps)¹ 

Notes

• 1. See optional <automode>, <min_rate>, <max_rate> and <max_TX_rate> subparameters.
• 2. For V.23, originating modes transmit at 75 bps and receive at 1200 bps; answering modes transmit at 1200 bps and receive at 75 bps. The rate is always specified as 1200 bps.

The modem may also automatically switch to another modulation (automode), subject to the following constraints:

• a. The modem may not be able to automatically switch from the current modulation (specified by <mod>) to some
• 
  other modulation. For example, there is no standard way to automode from Bell 103 to V.23.
• b. The DTE may disable automode operation (see <automode> below).
• c. The DTE may constrain the range of modulations available by specifying the lowest and highest rates (see
• 
  <min_rate> and <max_rate> below).
• 2. <automode> is an optional numeric value which enables or disables automatic modulation negotiation using V.8 Bis/V.8 or V.32 bis Annex A. The options are:

The default value is 1, which enables automode. Note, however, there are modulations for which there is no automatic negotiation, e.g., Bell 212 (<mod> = 69).
For <automode> = 0 (automode disabled, i.e., fixed modulation):

• a. If <max_rate> is within the rates supported by the selected modulation, the selected rate is that specified by <max_rate>.
• 
  For example:

  +MS=10,0,1200,4800 selects V.32 bis 4800 bps fixed rate.

• b. If <max_rate> is greater than the highest speed supported by the modulation specified by <mod>, the starting rate is the highest rate supported by the selected modulation.
• 
  For example:

  +MS=10,0,2400,14400 selects V.32 bis 14400, 12000, 9600, 7200, or 4800 bps.

• c. To emulate issuance of the N0S37=x command sequence to select fixed mode operation, specify the <max_rate> and <min_rate> both to be the (same) requested speed, and <mod> to be the modulation for that speed.
• 
  For example:

  +MS=11,0,16800,16800 selects V.34 16800 bps fixed mode (no comparable S37 command).
  +MS=10,0,12000,12000 selects V.32 bis 12000 bps fixed mode (same as N0S37=10).
  +MS=2,0,2400,2400 selects V.22 bis 2400 bps fixed mode (same as N0S37=6).

  For <automode> = 1 (automode enabled, i.e., automatically selected speed and modulation):
  The modem connects at the highest possible rate in accordance with V.8 bis/V.8, or V.32 bis Annex A if V.8 bis/V.8 is not supported by the remote modem.

• a. If <max_rate> is greater than the highest rate supported by the modulation specified by <mod>, the modem automodes down from the highest rate of the selected modulation.
• 
  For example:

  +MS=10,1,1200,24000 selects automoding down from V.32 bis 14400 bps.

• b. To emulate issuance of the N1S37=x sequence command, specify the modulation and the rate to start automoding down from using <mod> and <max_rate>, respectively. Set <min_rate> to 300 to allow automoding all the way down to V.21 300 bps.
• 
  For example:

  +MS=11,1,300,16800 selects automode starting at V.34 16800 bps (no comparable S37 command).
  +MS=9,1,300,12000 selects automode starting at V.32 bis 12000 bps (same as N1S37=10).

• 3. <min_rate> is an optional number which specifies the lowest rate at which the modem may establish a connection. The value is decimal coded, in units of bps, e.g., 2400 specifies the lowest rate to be 2400 bps. The default is 300 for 300 bps.
• 4. <max_rate> is an optional number which specifies the highest rate at which the modem may establish a connection. The value is decimal coded, in units of bps, e.g., 14400 specifies the highest rate to be 14400 bps. The default is 56000 for 56000 bps modems.
• 5. <x_law> is an optional number which specifies the codec type. The options are:

  0 = m-Law
  1 = A-Law
  Note that ATZ will reset the <x_law> selection to 0 (m-Law).

• 6. <reserved> must not be changed from the default value of 0.
  
• 7. <max_TX_rate> is an optional number which specifies the highest rate at which the modem may establish a transmit connection. The value is decimal coded, in units of bps, e.g., 33600 specifies the highest rate to be 33600 bps. The default is 33600.
  Result Codes:
  OK Valid subparameter string
  ERROR Otherwise.

Command

Function

Command

Function

• 1. When the AT** command is issued, the modem firmware boot loader is invoked and the user will first load a flash load module (FLM) into the modems RAM. The FLM contains the programming algorithm for the flash memory device being programmed and any messages that may be sent during the load process.
• 2. The user will then load the new modem firmware which the FLM will then program into the flash memory device.

Procedure: 

• 1. Install in the modem a flash memory programmed with the modem firmware; ensure that the flash memory device is programmed with the sector secure mode set to UNSECURE (AMD only), otherwise the device cannot be re-programmed in the modem.
• 2. Put the BPFLxxxx.S37 file and the new modem firmware file (e.g., FLSHxxxx.S37) in an appropriate directory on the computer's hard disk.
• 3. Configure the communications application program for a DTE rate of between 9600 bps and 57600 bps (57600 bps is faster) and RTS/CTS flow control. A load at 57600 bps will take approximately 2 minutes; a load at 19200 bps will take approximately 6 minutes.
• 4. Check the modem for response by typing AT.
• 5. Initiate the download process using the AT**n command, where:

  AT** or AT**0 Download speed is the last sensed speed (recommended command). 
  AT**1 Download speed is 38.4k bps. 
  AT**2 Download speed is 57.6k bps.

  The "Download Initiated" message appears upon issuing the AT**n command. 

• 6. Perform an ASCII upload of the BPFLxxxx.S37 file from the host computer to the modem RAM using an industry standard communications software or an equivalent process (ensure that all ASCII translation or pacing is turned off).
• 
  To abort the load at this point, wait for the BPFLxxxx.S37 download process to time-out, send a bad S37 record, or reset (POR) the modem. If the load process times-out, the modem must be reset (ATZ) before the BPFLxxxx.S37 file can be loaded again. 
• 7. After the BPFLxxxx.S37 file has been loaded, perform an ASCII upload of the new modem firmware hex file (e.g., FLSHxxxx.S37) from the host computer to the modem RAM using an industry standard communications software or an equivalent process. There will be a 3-second pause after the first record of the FLSHxxxx.S37 file is sent, which is the FLASH erase cycle. 
• 
  There is no turning back at this point. 
  If the flash download fails (because of a bad .S37 record for example) or the upload is aborted, as long as the modem is not turned off or reset, it will remain in the flash load cycle and the upload can be re-attempted at step 7. 
  A "Wrong Device" message is displayed if an incorrect BPFLxxxx.S37 is used. In this case, restart at step 5 and upload the correct FLM file. 
  A "Wrong Hex file or flow control" message is displayed if an incompatible hex file format is used (non-Motorola S3 format) or if the DTE ignores flow control (the flash download uses both Xon/Xoff and RTS/CTS flow control). If the wrong format was used, reinitiate the upoad at step 7 using a correct firmware hex file. 
• 8. A "Device successfully programmed" message is displayed at the completion of a successful download and the modem will do a cold start.

Command

Function

• 1. The Ring Indicate (RI) output does not toggle on the first ring if AT-SDR_0.
• 2. The RI output waveform is the same for all ring types detected, i.e., RI is on for the total duration of the ring period.

Command

Function

Operating Mode

This command controls the preferred error correcting mode to be negotiated in a subsequent data connection.

\N2

Selects reliable (error-correction) mode. The modem will first attempt a LAPM connection and then an MNP connection. Failure to make a reliable connection results in the modem hanging up.

(Forces &Q5, S36=4, and S48=7.)

\N3

\N4

\N5

Command

Function

Command

Function

• 1. The modem does not present any Caller ID information if the DCE detects a checksum error in the Caller ID packet.
• 2. In the event of an unrecognized data tag, the modem will present the data in ASCII hex numbers following the MESG tag.

Example of Formatted Form Reporting 

• 1. The following example illustrates the standard Caller ID message packet.
• 
  RING 
  DATE = 0321 
  TIME = 1405 
  NMBR = 5045551234 
  NAME = A N OTHER 
  RING 
  RING

• 2. The following example illustrates the case where the tag of the packet is not recognized by the modem.
• 
  RING 
  MESG = 060342424231 
  RING 
  RING

Unformatted Form Reporting 
The modem presents all information and packet control information found in the message. The modem, however, excludes 
the leading U's (channel seizure information) from the presentation. The packet is presented in ASCII printable hex numbers, 
the modem does not insert spaces, or line feeds, for formatting between bytes or words of the packet. 
The modem does not detect the checksum of the packet. 
Example of Unformatted Form Reporting 

RING 
0412303332323234303539313435353132333435 
RING 
RING

AT COMMAND RESULT CODES
The modem responds to commands from the DTE and to activity on the line by signaling to the DTE in the form of result codes. The result codes that the modem can send are described below.
Two forms of each result code are available: long-form, an English-like "verbose" response, and short-form, a data-like numeric response (included in parentheses following the long-form). The long-form code is preceded and terminated by the sequence < CR> < LF>. The short-form is terminated by < CR>, only with no preceding sequence.
If result messages are suppressed, nothing is returned to the DTE.

OK (0)

The OK code is returned by the modem to acknowledge execution of a command line.

CONNECT (1)
The modem will send this result code upon connecting when:

• 1. The line speed is 300 bps and the modem has been instructed to report the line speed to the DTE upon connecting, or
• 2. The DTE speed is 300 bps and the modem has been instructed to report the DTE speed to the DTE upon connecting, or
• 3. The range of result code responses is restricted by the X command such that no speed reporting is allowed.

RING (2)
The modem sends this result code when incoming ringing is detected on the line. When cellular interface is selected, RING indicates that the cellular phone is receiving an incoming call.

NO CARRIER (3)
The modem sends this result code when attempting to establish a call if:

• 1. Ringback is detected and later ceases but no carrier is detected within the period of time determined by register S7, or
• 2. No ringback is detected within the period of time determined by register S7.

This result code is also used when the modem auto-disconnects due to loss of carrier.
Under X0, if busy tone detection is enforced, this result code is used as a response to the detection of busy or circuit busy.
Under X0, if dial tone detection is enforced or selected, this result code is used to indicate that dial tone has not been detected.

ERROR (4)
The modem returns this result code if the command line contains a syntax error or it is unable to execute a command contained in the command line. It is issued if a command does not exist or if the parameter supplied is outside the permitted range.
Under X0, X1, X2, and X3, this result is used instead of DELAYED and BLACKLISTED.

CONNECT 1200 (5)
For X1, X2, X3, and X4, the modem sends this result code when:

• 1. The line speed is 1200 bps and the modem has been instructed to report the line speed to the DTE upon connecting, or
• 2. The DTE speed is 1200 bps and the modem has been instructed to report the DTE speed to the DTE upon connecting.

(Also, see the W command.)

NO DIALTONE (6)
For X2 and X4, the modem sends this result code if it has been instructed to wait for dial tone during dialing but none is received.
When cellular phone interface is selected, NO DIALTONE indicates that cellular service is not currently available.

BUSY (7)
For X3 and X4, if busy tone detection is enforced, the modem sends this result code when attempting to originate a call if the busy (engaged) signal is detected on the line.

NO ANSWER (8)
The modem sends this result code when attempting to originate a call if a continuous ringback signal is detected on the line until the expiration of the timer S7.

CONNECT 0600 (9)
For X1, X2, X3, and X4, the modem sends this result code when:

• 1. The line speed is 600 bps and the modem has been instructed to report the line speed to the DTE upon connecting, or
• 2. The DTE speed is 600 bps and the modem has been instructed to report the DTE speed to the DTE upon connecting.

CONNECT 2400 (10)
For X1, X2, X3, and X4, the modem sends this result code when:

• 1. The line speed is 2400 bps and the modem has been instructed to report the line speed to the DTE upon connecting, or
• 2. The DTE speed is 2400 bps and the modem has been instructed to report the DTE speed to the DTE upon connecting.

CONNECT 4800 (11)
For X1, X2, X3, and X4, the modem sends this result code when:

• 1. The line speed is 4800 bps and the modem has been instructed to report the line speed to the DTE upon connecting, or
• 2. The DTE speed is 4800 bps and the modem has been instructed to report the DTE speed to the DTE upon connecting.

CONNECT 9600 (12)
For X1, X2, X3, and X4, the modem sends this result code when:

• 1. The line speed is 9600 bps and the modem has been instructed to report the line speed to the DTE upon connecting, or
• 2. The DTE speed is 9600 bps and the modem has been instructed to report the DTE speed to the DTE upon connecting.

CONNECT 7200 (13)
For X1, X2, X3, and X4, the modem sends this result code when:

• 1. The line speed is 7200 bps and the modem has been instructed to report the line speed to the DTE upon connecting, or
• 2. The DTE speed is 7200 bps and the modem has been instructed to report the DTE speed to the DTE upon connecting.

CONNECT 12000 (14)
For X1, X2, X3, and X4, the modem sends this result code when:

• 1. The line speed is 12000 bps and the modem has been instructed to report the line speed to the DTE upon connecting, or

• 2. The DTE speed is 12000 bps and the modem has been instructed to report the DTE speed to the DTE upon connecting.

CONNECT 14400 (15)
For X1, X2, X3, and X4, the modem sends this result code when:

• 1. The line speed is 14400 bps and the modem has been instructed to report the line speed to the DTE upon connecting, or

• 2. The DTE speed is 14400 bps and the modem has been instructed to report the DTE speed to the DTE upon connecting.

CONNECT 19200 (16)
For X1, X2, X3, and X4, the modem sends this result code when:

• 1. The line speed is 19200 bps and the modem has been instructed to report the line speed to the DTE upon connecting, or
• 2. The DTE speed is 19200 bps and the modem has been instructed to report the DTE speed to the DTE upon connecting.

CONNECT 38400 (17)
For X1, X2, X3, and X4, the modem sends this result code upon connecting when the DTE speed is 38400 bps and the modem has been instructed to report the DTE speed to the DTE upon connecting.

CONNECT 57600 (18)
For X1, X2, X3, and X4, the modem sends this result code upon connecting when the DTE speed is 57600 bps and the modem has been instructed to report the DTE speed to the DTE upon connecting.

CONNECT 115200 (19)
For X1, X2, X3, and X4, the modem sends this result code upon connecting when the DTE speed is 115200 bps and the modem has been instructed to report the DTE speed to the DTE upon connecting.

CONNECT 75TX/1200RX (22)
For X1, X2, X3, and X4, the modem returns this result code upon establishing a V.23 originate connection when the modem has been instructed to report the DCE speed upon connection.

CONNECT 1200TX/75RX (23)
For X1, X2, X3, and X4, the modem returns this result code upon establishing a V.23 answer connection when the modem has been instructed to report the DCE speed upon connection.

DELAYED (24)
For X4, the modem returns this result code when a call fails to connect and the number dialed is considered 'delayed' due to country blacklisting requirements.

BLACKLISTED (32)
For X4, the modem returns this result code when a call fails to connect and the number dialed is considered 'blacklisted'.

FAX (33)
The modem returns this result code when a fax modem connection is established in a facsimile mode.

DATA (35)
The modem returns this result code when a data modem connection is established in a facsimile mode.

CARRIER 300 (40)
The modem returns this result code when a 0-300 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)

CARRIER 1200/75 (44)
The modem sends this result code when the V.23 backward channel carrier has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)

CARRIER 75/1200 (45)
The modem sends this result code when the V.23 forward channel carrier has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)

CARRIER 1200 (46)
The modem sends this result code when a 1200 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)

CARRIER 2400 (47)
The modem sends this result code when a 2400 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)

CARRIER 4800 (48)
The modem sends this result code when a 4800 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)

CARRIER 7200 (49)
The modem sends this result code when a 7200 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)

CARRIER 9600 (50)
The modem sends this result code when a 9600 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)

CARRIER 12000 (51)
The modem sends this result code when a 12000 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)

CARRIER 14400 (52)
The modem sends this result code when a 14400 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)

CARRIER 16800 (53)
The modem sends this result code when a 16800 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)

CARRIER 19200 (54)
The modem sends this result code when a 19200 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)

CARRIER 21600 (55)
The modem sends this result code when a 21600 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)

CARRIER 24000 (56)
The modem sends this result code when a 24000 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)

CARRIER 26400 (57)
The modem sends this result code when a 26400 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)

CARRIER 28800 (58)
The modem sends this result code when a 28800 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)

CONNECT 16800 (59)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 16800 bps and the modem has been instructed to report the DTE speed upon connecting.

CONNECT 21600 (61)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 21600 bps and the modem has been instructed to report the DTE speed upon connecting.

CONNECT 24000 (62)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 24000 bps and the modem has been instructed to report the DTE speed upon connecting.

CONNECT 26400 (63)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 26400 bps and the modem has been instructed to report the DTE speed upon connecting.

CONNECT 28800 (64)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 28800 bps and the modem has been instructed to report the DTE speed upon connecting.

COMPRESSION: CLASS 5 (66)
This message is sent to the DTE when the modem has connected in MNP Class 5 and COMPRESSION message reporting has been enabled. (See S95 and Xn.)

COMPRESSION: V.42 bis (67)
This message is sent to the DTE when the modem has connected in V.42 bis and COMPRESSION message reporting has been enabled. (See S95 and Xn.)

COMPRESSION: NONE (69)
This message is sent to the DTE when the modem has connected without data compression and COMPRESSION message reporting has been enabled. (See S95 and Xn.)

PROTOCOL: NONE (70)
This message is sent to the DTE when the modem has connected without any form of error correction, and the PROTOCOL message reporting has been enabled. (See S95 and Xn.)

PROTOCOL: LAPM (77)
This message is sent to the DTE when the modem has connected in the V.42 LAPM mode of error correction, and
PROTOCOL message reporting has been enabled. (See S95 and Xn.)

CARRIER 31200 (78)
The modem sends this result code when a 31200 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)

CARRIER 33600 (79)
The modem sends this result code when a 33600 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)

PROTOCOL: ALT (80)
This message is sent to the DTE when the modem has connected in the MNP mode of error correction, and PROTOCOL message reporting has been enabled. (See S95 and Xn.)

PROTOCOL: ALT-CELLULAR (81)
This message is sent to the DTE when the modem has connected in the MNP 10 mode and cellular power level adjustment is enabled (")M1 or )M2").(See S95 and Xn.)

CONNECT 33600 (84)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 33600 bps and the modem has been instructed to report the DTE speed upon connecting.

CONNECT 31200 (91)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 31200 bps and the modem has been instructed to report the DTE speed upon connecting.

CARRIER 28000 ()
The modem sends this result code when a 28000 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)
 
CARRIER 29333 ()
The modem sends this result code when a 29333 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)

CARRIER 30667 ()
The modem sends this result code when a 30667 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)

CARRIER 33333 ()
The modem sends this result code when a 33333 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)

CARRIER 34667 ()
The modem sends this result code when a 34667 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)

CARRIER 37333 ()
The modem sends this result code when a 37333 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)

CARRIER 38667 ()
The modem sends this result code when a 38667 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)

CARRIER 41333 ()
The modem sends this result code when a 41333 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)

CARRIER 42667 ()
The modem sends this result code when a 42667 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)

CARRIER 45333 ()
The modem sends this result code when a 45333 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)

CARRIER 46667 ()
The modem sends this result code when a 46667 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)

CARRIER 49333 ()
The modem sends this result code when a 49333 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)

CARRIER 50667 ()
The modem sends this result code when a 50667 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)

CARRIER 53333 ()
The modem sends this result code when a 53333 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)

CARRIER 54667 ()
The modem sends this result code when a 54667 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)

CARRIER 32000 (150)
The modem sends this result code when a 32000 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)

CARRIER 34000 (151)
The modem sends this result code when a 34000 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)

CARRIER 36000 (152)
The modem sends this result code when a 36000 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)

CARRIER 38000 (153)
The modem sends this result code when a 38000 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)

CARRIER 40000 (154)
The modem sends this result code when a 40000 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)

CARRIER 42000 (155)
The modem sends this result code when a 42000 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)

CARRIER 44000 (156)
The modem sends this result code when a 44000 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)

CARRIER 46000 (157)
The modem sends this result code when a 46000 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)

CARRIER 48000 (158)
The modem sends this result code when a 48000 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)

CARRIER 50000 (159)
The modem sends this result code when a 50000 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)

CARRIER 52000 (160)
The modem sends this result code when a 52000 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)

CARRIER 54000 (161)
The modem sends this result code when a 54000 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)

CARRIER 56000 (162)
The modem sends this result code when a 56000 bps data rate has been detected on the line and carrier reporting has been enabled. (See S95 and Xn.)

CONNECT 32000 (165)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 32000 bps and the modem has been instructed to report the DTE speed upon connecting.

CONNECT 34000 (166)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 34000 bps and the modem has been instructed to report the DTE speed upon connecting.

CONNECT 36000 (167)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 36000 bps and the modem has been instructed to report the DTE speed upon connecting.

CONNECT 38000 (168)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 38000 bps and the modem has been instructed to report the DTE speed upon connecting.

CONNECT 40000 (169)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 40000 bps and the modem has been instructed to report the DTE speed upon connecting.

CONNECT 42000 (170)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 42000 bps and the modem has been instructed to report the DTE speed upon connecting.

CONNECT 44000 (171)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 44000 bps and the modem has been instructed to report the DTE speed upon connecting.

CONNECT 46000 (172)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 46000 bps and the modem has been instructed to report the DTE speed upon connecting.

CONNECT 48000 (173)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 48000 bps and the modem has been instructed to report the DTE speed upon connecting.

CONNECT 50000 (174)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 50000 bps and the modem has been instructed to report the DTE speed upon connecting.

CONNECT 52000 (175)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 52000 bps and the modem has been instructed to report the DTE speed upon connecting.

CONNECT 54000 (176)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 54000 bps and the modem has been instructed to report the DTE speed upon connecting.

CONNECT 56000 (177)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 56000 bps and the modem has been instructed to report the DTE speed upon connecting.

CONNECT 28000 (180)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 28000 bps and the modem has been instructed to report the DTE speed upon connecting.

CONNECT 29333 (181)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 29333 bps and the modem has been instructed to report the DTE speed upon connecting.

CONNECT 30667 (182)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 30667 bps and the modem has been instructed to report the DTE speed upon connecting.

CONNECT 33333 (183)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 33333 bps and the modem has been instructed to report the DTE speed upon connecting.

CONNECT 34667 (184)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 34667 bps and the modem has been instructed to report the DTE speed upon connecting.

CONNECT 37333 (185)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 37333 bps and the modem has been instructed to report the DTE speed upon connecting.

CONNECT 38667 (186)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 38667 bps and the modem has been instructed to report the DTE speed upon connecting.

CONNECT 41333 (187)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 41333 bps and the modem has been instructed to report the DTE speed upon connecting.

CONNECT 42667 (188)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 42667 bps and the modem has been instructed to report the DTE speed upon connecting.

CONNECT 45333 (189)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 45333 bps and the modem has been instructed to report the DTE speed upon connecting.

CONNECT 46667 (190)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 46667 bps and the modem has been instructed to report the DTE speed upon connecting.

CONNECT 49333 (191)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 49333 bps and the modem has been instructed to report the DTE speed upon connecting.

CONNECT 50667 (192)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 50667 bps and the modem has been instructed to report the DTE speed upon connecting.

CONNECT 53333 (193)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 53333 bps and the modem has been instructed to report the DTE speed upon connecting.

CONNECT 54667 (194)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 54667 bps and the modem has been instructed to report the DTE speed upon connecting.

CONNECT 230400 (20)
For X1, X2, X3, and X4, the modem returns this result code upon connecting when the DTE speed is 230400 bps and the modem has been instructed to report the DTE speed upon connecting.

+FCERROR (+F4)
This message is sent to the DTE when high speed fax data (V.27, V.29, V.33, or V.17) is expected and a V.21 signal is received.

• 1. An 'x' in a column indicates that the message (either the long form if verbose, or the value only for short form) will be generated when that particular value of 'n' (shown at the top of the column) has been selected by the use of ATXn. If the column is blank, then no message will be generated for that x option. A numeral indicates which less explicit message (verbose or short form) will be output for that X option.
• 2. RC288 and higher rate modems.
• 3. RC336 and higher rate modems.
• 4. RC56 modems.

AUDIOSPAN AND DSVD COMMANDS
AudioSpan and DSVD are two technologies that allow simultaneous voice and data operation using a Rockwell modem connected to a telephone line. AudioSpan and DSVD implementations differ in the manner that voice and modem data are combined. Voice and data channels are combined in the analog domain for AudioSpan and in the digital domain for DSVD.

Establishing a AudioSpan or DSVD connection is analogous to establishing a regular data modem connection. Initiate the call using normal dialing (ATD) and answering (ATA) procedures. The modem can switch from a regular phone conversation into AudioSpan or DSVD mode and back to phone conversation. A handset, headset, or microphone/speaker can be used for voice communication during AudioSpan or DSVD mode.

AudioSpan operates in normal (non-error corrected) or error-corrected/compression mode (MNP 5 or V.42 bis depending on the error correction settings of the modems). The DTE rate must be equal to or greater than the anticipated DCE connection speed. In general, DTE speed of 38400 bps or higher should be used.

Commands Supported by Both AudioSpan and DSVD
-SMS= x, y, z, t - Select AudioSpan/DSVD Mode
The x parameter selects Data, AudioSpan, or DSVD mode, or enables automatic mode selection. The y, z, t parameters are optional and are required only if the user wishes to control connection speeds. For example, AT-SMS=2 is sufficient to enable SVD.

x: AudioSpan/DSVD/Data mode select and automatic mode select enable

y: Minimum data speed (bps) with audio for AudioSpan mode (see y value in following table)
z: Maximum data speed (bps) with audio for AudioSpan mode (see z value in following table)