MITSUBISHI ELECTRONICS AMERICA, INC.
ST200 Series Technical Support Manual
84
January 2000
Problem: Calls cannot be initiated.
This type of complaint is usually the result of a de-activated account or an equipment failure.
Other possible causes can be found below.
What to Check
What to do
1. Is the antenna blocked?
Move the MT so that the antenna has a clear
view of the satellite.
2. Is the Received Signal Strength Indication
(RSSI) low?
Move the antenna to increase the RSSI.
3. Do you hear a fast busy (or “reorder”)
tone?
Make sure that the MT is not set to data mode.
Verify account status with service provider.
The reorder tone often indicates a problem
with the account that the service provider must
resolve. The system may be busy, so you
should try the call later.
4. Was the correct number dialed?
Try dialing the number again.
5. Are the connections between the AU, TU
and BSU secure?
Make sure the connections are secure.
6. Has the BSU been calibrated?
To calibrate the BSU, turn the MT off and
remain stopped or drive straight for 10 seconds
after turning it on again.
7. Is the BSU installed properly and
horizontally?
Install the BSU according to the instructions.
Problem: MT does not complete data calls
Successful data calls require 1) correct account set up, 2) a properly configured TU and 3) the
right DTE settings. The explanations for data call setup included in Appendix D of this manual
are usually sufficient. However, some users find that they must spend time working with their
data communications provider to properly set the DTE.
What to Check
What to do
1. Are the data parameters set correctly?
Use FCN 92 to check parameters.
2. Is service type set to data?
Use FCN 91 to change if necessary.
3. Are modem settings correct?
Work with your data service provider to make
sure the settings are correct.
