Industrial Grade Modems
300 - 1,200 - 2,400 - 4,800 - 7,200 - 9,600 - 14,400 - 33,600BPS
low voltage 10 to 36VDC - high voltage 18 to 72VDC / 110/220VAC 60/50 cycle AC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

HARDENED INDUSTRIAL GRADE MODEMS
Bell 103, 212, V.22, V.22bis, V.32, V.32bis, V.34
9 to 72 Volt DC Power & 115 VAC - Double Surge Protection - Temp Rated

To service the growing need for efficient, reliable data communications in the harsh environments of "remote" remote sites and industrial facilities. ARC has developed a family of data communications products that can operate from various AC & DC power supplies and survive high surge levels and extreme heat and cold.

Requires very little power making them ideal for solar powered applications

 

 

 

The base unit uses Modem Modules that can be interchanged.

 SPECIFICATIONS

Modem Modules

The base unit houses the power and Data & Telecom interfaces and uses Modem Modules that can be upgraded from 2.4 to14.4 to 33.6Kbps. This allows upgrades by replacing just the Modem Module.

  

 

SUMMARY OF THE ROCKWELL "AT" COMMAND SET

To communicate using the modem, use an asynchronous communication program. The command set for the modems is compatible with the Hayes command set.

 The modem is controlled and configured by the AT (attention command). Each command consists of the following elements (with the exception of the A/and the +++ command that will be discussed later). A command is not entered until a carriage return <ENTER> is entered. Spaces entered are ignored. For example, to enter the command `Answer', type ATA and <ENTER>.

Some commands do not have parameters. Any missing parameters in a command is assigned the value zero, which may be a valid parameter for the command. The sequence followed by AT command causes the modem to enter a command state. That is, AT without a command serves as a wake up code and an "OK" appears on the screen.  The modem queues the commands in a 40-character command line. The command line begins with AT and can have several commands. A separator is not required between the commands.

 When a carriage return is received, the commands are performed in the order in which they are sent to the modem. If more than 40 characters are sent to the modem, an error occurs and all commands must be re-entered.

 A common configuration for a remote modem is to answer the call and hang up on loss of carrier. To do this the RS232 interface has to be set for the correct configuration.

Option if the Computer uses pins 2, 3, & 7 only - Set the AT commands as follows

ATS0=1 (modem will answer on the first ring)
AT&D0 (modem will ignore DTR) factory default is AT&D1 which allows the modem to answer only if DTR is high.
AT&V to check the state of the "S" registers use AT&V
AT&W0 Don't forget to burn the new codes into E-PROM by AT&W0

To see your typing you made need to turn on E1 for the modem to echo back responses. Some software doe not like it's data echoed back so don't forget to check E1/E0 if your software is acting strange.  

Note: you may want to put the modem into a quiet mode - ATQ1 (ATQ0 is the default) modem does not send result codes -
which can confuse the computer.

A good configuration for a dumb mode operation is             AT&F&C1&D0E0Q1S0=1&W0

BASIC AT COMMANDS for the 14.4 & 33.6 MODEM MODULE...

Command        Function

A/         Re-execute command.

A          Go off-hook and attempt to answer a call.

B0        Select V.22 connection at 1200 bps.

B1        Select Bell 212A connection at 1200 bps.

C1        Return OK message.

Dn        Dial modifier.

E0        Turn off command echo.

E1        Turn on command echo.

F0        Select auto-detect mode (equivalent to N1).

F1        Select V.21 or Bell 103.

F2        Reserved.

F3        Select V.23 line modulation.

F4        Select V.22 or Bell 212A 1200 bps line speed.

F5        Select V.22 bis line modulation.

F6        Select V.32 bis or V.32 4800 line modulation.

F7        Select V.32 bis 7200 line modulation.

F8        Select V.32 bis or V.32 9600 line modulation.

F9        Select V.32 bis 12000 line modulation.

F10       Select V.32 bis 14400 line modulation.

H0        Initiate a hang-up sequence.

H1        If on-hook, go off-hook and enter command mode.

 

I0          Report product code.

I1          Report pre-computed checksum.

I2          Report OK.

I3          Report firmware revision, model, and interface type.

I4          Report response "Telenetics Inc. Rev"

I5          Report the country code parameter.

I6          Report modem data pump model and code revision.

I7          Reports the DAA code

L0         Set low speaker volume.

L1         Set low speaker volume.

L2         Set medium speaker volume.

L3         Set high speaker volume.

M0        Turn speaker off.

M1        Turn speaker on during handshaking and turn speaker off while receiving carrier.

M2        Turn speaker on during handshaking and while receiving carrier.

M3        Turn speaker off during dialing and receiving carrier and turn speaker on during answering.

N0        Turn off automode detection.

N1        Turn on automode detection.

O0        Go on-line.

O1        Go on-line and initiate a retrain sequence.

P          Force pulse dialing.

Q0        Allow result codes to DTE.

Q1        Inhibit result codes to DTE.

 Sn       Select S-Register as default.

Sn?      Return the value of S-Register n.

=v         Set default S-Register to value v.

?          Return the value of default S-Register.

T          Force DTMF dialing.

V0        Report short form (terse) result codes.

V1        Report long form (verbose) result codes.

W0       Report DTE speed in EC mode.

W1       Report line speed, EC protocol and DTE speed.

W2       Report DCE speed in EC mode.

X0         Report basic call progress result codes, i.e., OK, CONNECT, RING, NO CARRIER (also, for busy, if enabled, and dial tone not detected),NO ANSWER and ERROR.

X1         Report basic call progress result codes and connections speeds (OK, CONNECT, RING, NO CARRIER (also, for busy, if enabled, and dial tone not detected), NO ANSWER, CONNECT XXXX, and ERROR.

X2         Report basic call progress result codes and connections speeds, i.e., OK, CONNECT, RING, NO CARRIER (also, for busy, if enabled, and dial tone not detected), NO ANSWER, CONNECT XXXX, and ERROR.

X3         Report basic call progress result codes and connection rate, i.e., OK, CONNECT, RING, NO CARRIER, NO ANSWER, CONNECT XXXX, BUSY, and ERROR.

X4         Report all call progress result codes and connection rate, i.e., OK, CONNECT, RING, NO CARRIER, NO ANSWER, CONNECT XXXX, BUSY, NO DIAL TONE and ERROR.

Y0        Disable long space disconnect before on-hook.

Y1        Enable long space disconnect before on-hook.

Z0         Restore stored profile 0 after warm reset.

Z1         Restore stored profile 1 after warm reset.

&C0      Force RLSD active regardless of the carrier state.

&C1      Allow RLSD to follow the carrier state.

 

 

&D0      Interpret DTR ON-to-OFF transition per &Qn:

&Q0, &Q5, &Q6 The modem ignores DTR.

&Q1, &Q4         The modem hangs up.

&Q2, &Q3         The modem hangs up.

&D1      Interpret DTR ON-to-OFF transition per &Qn:

&Q0, &Q1, &Q4,.

&Q5, &Q6         Asynchronous escape.

&Q2, &Q3         The modem hangs up.

&D2      Interpret DTR ON-to-OFF transition per &Qn:

&Q0 through &Q6 The modem hangs up.

&D3      Interpret DTR ON-to-OFF transition per &Qn:.

&Q0, &Q1, &Q4,.

&Q5, &Q6 The modem performs soft reset.

&Q2, &Q The modem hangs up.

&F0      Restore factory configuration 0.

&F1      Restore factory configuration 1.

&G0      Disable guard tone.

&G1      Disable guard tone.

&G2      Enable 1800 Hz guard tone.

&J0       Set S-Register response only for compatibility.

&J1       Set S-Register response only for compatibility.

&K0      Disable DTE/DCE flow control.

&K3      Enable RTS/CTS DTE/DCE (Hardware) flow control.

&K4      Enable XON/XOFF DTE/DCE (Software) flow control.

&K5      Enable transparent XON/XOFF flow control.

&K6      Enable both RTS/CTS and XON/XOFF flow control.

&L0      Select dial up line operation.

&L1      Select leased line operation.

  &M0   Select direct asynchronous mode.

&M1     Select sync connect with async off-line command mode. *

&M2     Select sync connect with async off-line command mode and enable DTR dialing of directory zero. *

&M3     Select sync connect with async off-line command mode and enable DTR to act as Talk/Data switch. *

&P0      Set 10 pps pulse dial with 39%/61% make/break.

&P1      Set 10 pps pulse dial with 33%/67% make/break.

&P2      Set 20 pps pulse dial with 39%/61% make/break.

&P3      Set 20 pps pulse dial with 33%/67% make/break.

&Q0      Select direct asynchronous mode.

&Q1      Select sync connect with Async off-line command mode. *

&Q2      Select sync connect with Async off-line command mode and enable DTR dialing of directory zero. *

&Q3      Select sync connect with Async off-line command mode and enable DTR to act as Talk/Data switch. *

&Q4      Select Hayes AutoSync mode.

&Q5      Modem negotiates an error-corrected link.

&Q6      Select asynchronous operation in normal mode.

&R0      CTS tracks RTS (Async) or acts per V.25 (sync).

&R1      CTS is always active.

&S0      DSR is always active.

&S1      DSR acts per V.25.

&T0      Terminate any test in progress.

 

&T1      Initiate local analog loopback.

&T2      Returns ERROR result code.

&T3      Initiate local digital loopback.

&T4      Allow remote digital loopback.

&T5      Disallow remote digital loopback request.

&T6      Request an RDL without self-test.

&T7      Request an RDL with self-test.

&T8      Initiate local analog loop with self-test.

&V        Display current configurations.

&W0     Store the active profile in NVRAM profile 0.

&W1     Store the active profile in NVRAM profile 1.

&X0      Select internal timing for the transmit clock.

&X1      Select external timing for the transmit clock.

&X2      Select slave receive timing for the transmit clock.

&Y0      Recall stored profile 0 upon power up.

&Y1      Recall stored profile 1 upon power up.

&Zn=x   Store dial string x (to 35) to location n (0 to 3 depending upon modem model).

%E0     Disable line quality monitor and auto retrain.

%E1     Enable line quality monitor and auto retrain.

%E2     Enable line quality monitor and fallback/fall forward.

%L       Return received line signal level.

%Q       Report the line signal quality.

\D1       Enable Auto Dial via DTR off to on sequence *PE14400 only

\D0       Disable Auto Dial (default) *PE14400 only

\G0       Disable modem to modem flow control.

\G1       Enable modem to modem flow control.

\H0       Command Mode default

\H1       Lease Line Mode

\Kn       Controls break handling during three states:

            When modem receives a break from the DTE:

\K0,2,4  Enter on-line command mode, no break sent to the remote modem.

\K1       Clear buffers and send break to remote modem.

\K3       Send break to remote modem immediately.

\K5       Send break to remote modem in sequence with transmitted data.

            When modem receives \B in on-line command state:

\K0,1    Clear buffers and send break to remote modem.

\K2,3    Send break to remote modem immediately.

\K4,5    Send break to remote modem in sequence with transmitted data.

            When modem receives break from the remote modem:

\K0,1    Clear data buffers and send break to DTE.

\K2,3    Send a break immediately to DTE.

\K4,5    Send a break with received data to the DTE.

\M0       Select Answer Mode (Lease Line) with \H1 active

\M1       Select Originate Mode (Lease Line) with \H1 active

\N0       Select normal speed buffered mode.

\N1       Select direct mode.

\N2       Select reliable link mode.

\N3       Select auto reliable mode.

\N4       Force LAPM mode.

\N5       Force MNP mode.

\S0       Unlock command mode (normal mode) *PE14400 only

\S1       Lock (out) command mode (security mode) *PE14400 only

 

 

 

 

 

Error Diagnostics

 

Is the computer talking with the modem?

 When you type AT<CR>, "OK" should be displayed. If the modem does not respond:

1. Make sure the modem is firmly connected to the computer.

2. Verify the communication program is configured to the correct com port (COM L, COM2:, COM3:, or COM4:).

3. Verify the baud rate (2400, 1200, or 300) and check parity (even, odd, none).

4. If the modem still does not respond, type AT&F<CR>. This will reset the modem to the original factory settings.

5. Try unplugging the modem and plugging it back in to ensure clean contact connections.

 

If the modem responds, but...

---characters are not displayed, type ATEI <CR>. This tells the modem to echo commands to the screen.

...characters are displayed double, type ATE<CR>. This turns the echo feature off.

 

Modem does not answer.

If the modem does not answer an incoming call, type
ATSO = I < CR>.

* Check to make sure your terminal device has DTR high

   

Modem will not dial a telephone number.

 

If the computer displays NO DIALTONE, the modem is not receiving a dial tone. Connect a standard telephone to the telephone line to verify a dial tone. If you do not hear dial tone, something is wrong with either your telephone cable or telephone line. Try another cable or line.

 On some telephone lines connected to internal telephone systems, the telephone lines are not standard and will not work with standard telephones. Such lines will not work with this modem. Adapters are available to convert these lines so they may work with standard telephone equipment.

  

Modem can dial but can't communicate.

If you cannot communicate properly, something may be wrong with the other system. Try calling a different modem.

Unusual characters appear on the screen.

If you can dial, but unusual characters appear on the screen while communicating, check the communications settings of your communications software. The most common settings are 7EI (7 bits, even parity, I stop bit) and 8N 1 (8 bits, no parity, I stop bit).

Modem connects but cannot communicate.

Another possibility is that your modem and software are set for different speeds. In other words, you will be unable to communicate at 2400 bps with modems linked at 1200 bps. Check your speed settings.

 Your modem disconnects.

During communications the modem may disconnect from the phone line if-

 

1. It fails to connect to the remote modem.

2. It detects a loss of carrier from the remote modem.

3. You enter the escape and Hook command.

4. Turn off power to the computer.

 

 Note: you may want to put the modem into a quiet mode - ATQ1 (ATQ0 is the default)

modem does not send result codes which can confuse the computer.