CTS55 Test
Sequence
1094.0006.55 4.7
E-6
4.4
3rd Step - Call to MS
The CTS makes a call to the mobile. When the mobile is ringing, the user must answer the call by
pressing the appropriate button on the mobile station. If the mobile functions properly, the speech link on
channel 1 is now set up. The CTS puts a "
9
"
in the "Call to" box. The channels can be set in the Config
Channels menu which is reached by pressing the "Config" key. If the mobile does not accept the call
within a given time period, the test is then ended with a "f" in the "Call to" box.
All subsequent tests will
be skipped and the whole test terminated because it is not possible to perform any measurements on
the mobile without establishing a link.
Possible causes for a fail:
•
Acoustic tone generator for the ringing tone is defective or too weak.
•
The call was not accepted during ringing.
•
The call-acceptance switch or button is defective.
In all the above cases the error message "Call to mobile not answered" appears on the screen
.
•
The mobile is switched off and on whilst a call to the mobile is in progress.
In this case the error message "Location Update not expected" appears on the screen.
•
An unexpected call from the mobile is started by the user.
In this case the error message "Call from mobile not expected" appears on the screen.
4.5
4th Step - Echo Test
With a speech link set up with the CTS, it is possible to speak into the mobile phone and to receive the
speech back with a delay of 1 second. This test allows the user to assess the quality of the speech link
in transmit and receive modes. The test is ended with a "
9
"
or a "f" when either the "OK" key or "FAIL"
key is pressed.
4.6
5th Step - MS Release
The user is requested at this point to release the link by pressing the appropriate button at the mobile.
After a correct clear down of the speech link, the test is concluded with a "
9
"
in the "MSRel" box. If this
does not take place within a given time period, the test is ended and all subsequent tests are skipped. A
"f" is put in the "MSRel" box and the whole test terminated.
Possible external causes for "fail":
•
The switch or button for terminating the link is defective.
•
The mobile has not been put on hook.
In all the above cases the error message "Time-out - no response by mobile" appears on the screen
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