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Optivity Telephony Manager: System Administration - BT Business

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158 Common services<br />

Encryption<br />

2 Click Terminals.<br />

553-3001-330 Standard 3.00 August 2005<br />

The Terminal Properties dialog box opens (Figure 49).<br />

Figure 49<br />

Terminal Properties Base Port parameter<br />

3 Enter the new Base Port number, and then click OK.<br />

4 Edit the HTML page containing the applet. Ensure the applet’s Base Port parameter<br />

matches the one in the Terminal Properties (default = 4789).<br />

End of Procedure<br />

Data is encrypted so that someone monitoring the network traffic does not see plain<br />

ASCII data (which may contain user login, password, or other sensitive information).<br />

Every packet sent between the Terminal Server and the Terminal Client is 65 bytes and<br />

contains data that is masked with a key. This ensures that data is not easily readable,<br />

while keeping the overhead low for constant character Input/Output (I/O).<br />

Before sending a packet, the application picks a random location in a 256-byte key<br />

(known only to the server and the client), and uses the subsequent bytes to mask the<br />

character data. In essence, every packet is masked with one of 256 possible keys.

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