Siemens AC75 Bedienungsanleitung PDF herunterladen (Seite 417)

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AC75 AT Command Set

AC75_ATC_V01.002 Page 417 of 569 10/30/06

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SAP client

After RSA activation, the SAP client starts sending SAP CONNECTION_REQ messages (see Figure 15.4, SIM

usage states of SAP client). The SAP client still uses its local SIM until an SAP server responds and the param-

eter negotiation has been accomplished successfully. When the SAP client recognizes from the received ATR

data that the SIM of the SAP server is appropriate and uses the the correct transmission protocols, it switches

over to the server's SIM. Now, both sides start to exchange APDU data. If the APDU transfer was successful the

SAP client is required to enter the SIM PIN. Finally, when the SIM PIN authentication has been completed, the

SAP client can register to the cellular network - via the SIM inserted in the SAP server instead of its own local

SIM.

Figure 15.4: SIM usage states of SAP client

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