> 15.3.1 | Establishing an RSA Connection in a PC Environment

> To set up an RSA connection in a PC environment an appropriate PC application is needed. For test and evaluation purposes and as exemplary implementation guidance Siemens offers a PC application called "ComBridge". For ordering details contact your local Siemens dealer. "ComBridge" provides basic features to simulate an RSA application environment, e.g. mapping of the SAP communication between a SAP server and client. To support the different RSA coding modes (SAP and XSAP) and to transfer data between the two COM ports, the PC application uses two variable modules (filters):

> • | XSAP filter Translating the "^SRSM" URCs into the AT^SRSM command

> • | SAP filter Transparently transfer binary SAP messages. The generic "1:1" filter ("software null modem") can also be used for this purpose, but communication might be slower since it performs bytewise data transfer.