PRODUCT - Technical Support

• How do I silence the buzzer?
• I have no communication to the telephone company host computer, and the HOST COMMUNICATION LED is out on the front panel of the ATU.
• There is no communication between my CRT and the ATU.
• The POWER LED is dark (out) on my ATU.
• My automation communication is down, and the ATU says “Host Up, 685 Down” every 10 minutes.
• What are the communication settings for the computer (automation) port?
• Why is the red fault light on all the time?

• How do I silence the buzzer?
  • Press the “S” key.
• I have no communication to the telephone company host computer, and the HOST COMMUNICATION LED is out on the front panel of the ATU.
  • Look at your modem lights. If the CO light is dark(out), the data circuit is open and must be reported to the Telephone Company. You will need to supply your circuit # to the telephone company.
  • Look at your modem lights. If the TD light is on solid, this means your ATU is not connected to the modem, or your ATU is turned off. Check the cable between your modem and your ATU.
• There is no communication between my CRT and the ATU.
  • Check that the cable is secure between the terminal port on the ATU and the CRT.
  • Check that your CRT communications are set for 1200 baud, 8 bits and no parity.
  • Check that you can get into setup on your CRT. If you cannot get into the local CRT setup, the CRT is probably bad.
• The POWER LED is dark (out) on my ATU.
  • Check to make sure the power cord is plugged into the ATU and an AC receptacle, and that there is power coming out of the AC receptacle.
  • If you are sure there is power going into the ATU, call the technical support department at Numerex Services for an RMA number to send the unit back for repair.
• My automation communication is down, and the ATU says “Host Up, 685 Down” every 10 minutes.
  • Check to make sure the cable is plugged into the computer port of the ATU.
  • Remove the cable from the computer port on the back of the ATU. Place a paper clip between pins 2 and 3 in the connector. If the message Host Up, 685 Up appears across the terminal, the problem is most likely in the 685. If the 685 message does not appear after shorting pins 2 and 3 on the computer port, call Numerex Services for an RMA #.
• What are the communication settings for the computer (automation) port?
  • 1200 baud, 8 bits per character, 1 stop bit and no parity.
• Why is the red fault light on all the time?
  • The fault light comes on for one of the following reasons:
  • STU Non- Responding Message
  • Automation is Down
  • Communication to Host is Down
  • Scanner Out of Service
  • If the LED is always on, the problem is probably a non-responding STU.

Email DCX for more product information, or for your local telephone company representative.