User Manual

General Description Fixed Subscriber Unit Installation Manual
10/03/97 Release 1.00
Airstar-Wireless Local Loop
2-6
1. A specific analog line is rung in the CO. The signal is sent
to the COT via the MDF.
2. The COT detects the ringing of the line and sends the
incoming message with the Q.931 calling number to the
RPC.
3. When the RPC receives the incoming message from the
COT, the RPC converts that Q.931 message to the PHS
incoming message protocol and sends it through the MDF
to all of the RPs.
4. The RPs page all FSUs and PSs. When the corresponding
FSU number receives the paging message from the RP, it
rings the connected telephone.
5. If the ringing telephone is lifted off-hook, an off-hook
message is sent to the CO switch through the RP, RPC and
COT. Speech paths are established between the connected
telephones.
NOTE : If a call is received while dialing out, the incoming call has priority. In the
case of overlap sending, only DTMF dialing is availaable and DP is not
supported.
2.3 Authentication
Authentication is a function that prevents the unauthorized use of a
subscriber’s telephone number. The authentication procedure is performed
during Outgoing Calls, Incoming Calls and Location Registration. At
subscription time each FSU is configured with a unique authentication key and
telephone number. The COT is also configured with the telephone numbers
and authentication keys for all FSUs within its management database. After
receiving an authentication key code from the COT, the RPC:
1. Generates a random authentication pattern and sends it to
the FSU.
2. Receives the calculation result from the FSU.
3. Checks the result and sends both the calculation and check
result to the COT.