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S:\HP83206A\USRGUIDE\MANUAL\cpmeas.fm
Chapter 3, Processing Calls
Authentication
Authentication
The process of testing DCCH authentication (TIA/EIA-136) through the Call
Processing Subsystem requires the user to synchronize the base station and mobile
station. This synchronization requires that the base station and the mobile station
possess two pieces of shared secret data (SSD) to confirm a valid call. The first
piece is the
ESN of the mobile station and the second piece is the mobile station’s
A-key. The A-key is a secret 26-digit number stored in the mobile station’s semi-
permanent memory. The following sections describe how to:
• Initialize Call Processing with Authentication
• Page a Mobile Station with Authentication
• Originate a Call with Authentication
• Perform an SSD Update
• Perform a Unique Challenge
These procedures assume you understand how to configure the Test System to
emulate a base station. (See “Configure the Test Set to Emulate a Base Station” on
page 64)
DTC AND AVC
AUTHENTICATION
SETTINGS
The authentication settings used when connected on a DTC are somewhat different than
those used on an AVC. Basically, the RANDSSD data and A_KEY information are entered
differently. Otherwise, operation is the same.