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S:\HP892XX\USRGUIDE\manual\callscrn.fb
Chapter 6, Call Processing Subsystem
Using the CALL CONTROL Screen to test AMPS Authentication
Perform a Unique Challenge
There are two methods that can be used to perform a Unique Challenge-Response
procedure:
• Unique Challenge on the Control Channel
• Unique Challenge on the Voice Channel
Performing a Unique Challenge on the Control Channel
1. Ensure that the Test Set is in the active state. See "Turn on the Test Set’s Control
Channel" on page 154 for information on how to activate the Test Set.
2. Connect the mobile station to the Test Set as shown in Figure 17, "Connecting a
Mobile Station to the Test Set," on page 119.
3. Turn on the mobile station.
4. If the CALL CONTROL screen is not displayed, select CALL CNTL under the To
Screen menu. The CALL CONTROL screen will be displayed.
5. Position the cursor on the Display field and select Data.
6. Ensure that the Test Set has Initialized Call Processing with Authentication. See
"Initialize Call Processing with Authentication" on page 154 for information on
how to register the mobile station and activate Authentication.
7. Select AUTHEN on the To Screen menu. The AUTENTICATION will be displayed.
8. Select RAND_U field. Enter a new, valid RAND_U value (6-digit hexadecimal).
9. Select CALL CNTL under the To Screen menu. The CALL CONTROL screen will
be displayed.
10. Select Uniq Chal from the CC Order field. The Access annunciator light will
light while the Unique Challenge order is in progress. If the mobile station responds
properly on the reverse control channel, “Unique Challenge Successful” will
be displayed in the upper right-hand portion of the CALL CONTROL screen. If the
order failed, then “Unique Challenge Failed” will appear on the upper right-
hand portion of the CALL CONTROL screen.
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