Siemens TC63 Manuel d'utilisateur télécharger pdf (Page 375)

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TC63 AT Command Set

TC63_ATC_V00.490 Page 375 of 501 5/24/05

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• SAP Client

The SIM Access Client is connected via a serial link to the SIM Access Server. The client accesses and con-

trols the SIM inside the Server via the serial link. Typical examples of a server are a simple SIM card holder

or a portable phone in the car environment. A typical example of a client is a car phone, which uses a SIM

card in the server for a connection to the cellular network. With the additional AT Commands it is possible to

switch the TC63 to use an external SIM instead of the physically attached (local) SIM during runtime.

After SAP server activation (see (1) in Figure 15.3, SIM usage states of SAP client) the ME waits for the SAP

message CONNECTION_REQ. The server will use its local SIM until the parameter negotiation has been

accomplished successfully.

Figure 15.3: SIM usage states of SAP client

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Siemens TC63 Manuel d'utilisateur Page 375

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