Siemens AC75 - Manual (Page 416)

AC75 AT Command Set s
AC75_ATC_V01.002 Page 416 of 569 10/30/06
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The AC75 can operate either as SAP server or as SAP client. A brief description of the configuration is given
below.
SAP server
The SAP server has direct (galvanic) access to a SIM. It acts as a SIM card reader which assists the SAP client
in accessing and controlling this SIM via the serial link.
After RSA activation, the SAP server waits for SAP CONNECTION_REQ messages from the SAP client (see
Figure 15.3 , SIM usage states of SAP server ). The SAP server still uses its local SIM card until the parameter
negotiation with an SAP client has been accomplished successfully.
Figure 15.3: SIM usage states of SAP server