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ATO CMM 900-3W User Manual

Amps cellular modem module
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CMM 900-3W USER GUIDE
AMPS Cellular Modem Module (3W)
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Summary of Contents for ATO CMM 900-3W

  • Page 1 CMM 900-3W USER GUIDE AMPS Cellular Modem Module (3W) Page 1 of 1...

  • Page 2: Table Of Contents

    1. PRODUCT OVERVIEW 1.1 Features: ... 3 1.2 Serial Port Pins: ... 5 1.3 Applications:... 5 1.4 Your package includes: ... 5 2. SPECIFICATIONS 3.0 MODEM SETUP AND REGISTRATION 3.1 What you need to provide: ... 6 3.2 Registering the Cellular Modem Unit: ... 6 4.

  • Page 3: Product Overview

    America, Latin America, Australia, New Zealand and parts of Africa. AMPS system is not compatible with the digital systems, such as GSM (Global System for Mobile Communications). CMM 900-3W has RS232 interface and supports the popular AT command set normally associated with modems. Optionally TTL interface is also available. DIP Switch 1.1 Features:...
  • Page 4 Requires 5 Volts DC @ 1500 ma Page 4 of 4...

  • Page 5: Serial Port Pins

    1.2 Serial Port Pins: (RS 232 interface) Figure 2. DB9 Female RS-232 DCE Interface Pin No. 1.3 Applications: Example applications for data communications with CMM 900-3W include: Packet Data Radio SCADA and Telemetry Systems Remote gas/water/electric meter readings. Factory Automation systems Vending Machines 1.4 Your package includes:...

  • Page 6: Specifications

    2. SPECIFICATIONS Air Speed DTE Rate Data Compression & Error Detection Transmit Power Power Supply Interface Signals supported Operating Temperature Range Custom Configurations 3.0 MODEM SETUP AND REGISTRATION 3.1 What you need to provide: 5 Volts, 1500 ma regulated DC Power Supply Host PC with a terminal program, such as Hyper terminal, ProComm etc.

  • Page 7: Starting And Configuring The Modem

    Note 1: “ON” = Down position 4.2 Initializing the Cellular Modem: To start the CMM 900-3W unit, perform the following steps: Step 1: Connect the 5V DC power supply. Please take precaution that the polarity of the applied voltage is correct.

  • Page 8: Activating The Cellular Modem

    The Cellular Modem does NOT have to be configured every-time. The above information is stored in the Non-volatile memory built in the CMM 900-3W. Step 5: Enter AT+MODE=02<CR> The unit is now set for data mode. Step 6: Enter AT+SER <CR> The unit responds with SERVICE AVAILABLE.

  • Page 9: Theory Of Operation

    Step 1: Enter ATDT XXXX <CR> XXXX is the phone number of the modem you are calling. After approximately 30 seconds, the Cellular Modem responds with CONNECT message. Step 2: Type “ Hello” The party you called should see the message on their terminal screen. Step 3: Ask the called party to type a message and you should see that message on your terminal screen.
  • Page 10 Note: Commands entered incorrectly or with out-of-range parameters will result in an “ERROR” message. Commands entered correctly will result in “OK” message. Page 10 of 10...

  • Page 11: Result Codes

    5.1.2 Result Codes Result Codes refer to the responses of the cellular modem unit to a command. Unless the cellular modem has been programmed to be in the Quiet mode (Section 6.1), the unit will respond each time a command is issued. The default mode of the cellular modem is the verbose mode.

  • Page 12: On-Line State

    5.2 On-line State: In Online state, input(s) from the PC is treated as data to be transmitted over the airwaves, and input(s) from the airwaves is treated as received data from the remote end. The cellular modem is in online state in one of the two conditions: Cellular modem dials out and a successful connection is established.

  • Page 13: Supported At Commands

    Resets the modem. The unit responds with OK message Go on-line. This is done after the state of the unit is changed from on-line to command state. ATO then puts the unit back into online state. Cell modem dials out. XXXX is the phone number Puts the unit in test mode.
  • Page 14 ATQ1<CR> ATQ1&W&W1 AT&V<CR> ATI3<CR> ATH0 ATV0 ATV0&W&W1 ATV1 ATV1&W&W1 ATS0 information. Note: MIN, ESN, SID information are stored in the Non-volatile memory of the cell-modem and do not need to be entered on every Power- To exit Test mode, enter AT+MODE=02<CR> Unit does not respond with OK or non-verbose messages.

  • Page 15: Troubleshooting

    S7=60 & S10 register to 200. This will make the modem more tolerant of the noise hits. This can be done as follows: ATS0=1S7=60S10=200&W&W1<CR> If for some reason, the CMM 900-3W unit is not responding, please try the command: AT&F&W&W1 <CR> Whenever the command AT&F&W&W1 is issued, then you must do the following ATS0=1\N2+MS=11,1,1200,2400X3&W&W1 <CR>...

  • Page 16: Frequently Asked Questions (Faq)

    Is there any simple way to avoid frequent loss of connection? Please program the CMM 900-3W as follows AT+MS=11,1,1200,1200&W&W1<CR> This will force the CMM 900-3W to connect only at 1200 bps. What initialization string is recommended to communicate with non-MNP modems? Connection with non-MNP landline modems is not recommended.
  • Page 17 Is there any recommended init string for various land line mode. The following have been tried with excellent results. a) For US Robotics / 3 Com modems: ATS10=200&A3&B1&N2&U2&W&W1 <CR> b) For Rockwell chip set based land-line modems 33600 and lower AT%E2\N2S7=60S10=200+MS=11,1,1200,2400&w&w1 <CR>...

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