Control Of Data Encryption - ZyXEL Communications Omni TA128 User Manual

Chapter 8 - X.75 ISDN Communications

Control of Data Encryption

The AT commands to control the data encryption are as follows :
S Register setting
ATS89.0 = 1
ATS89.0 = 0
ATS89.1 = 1
ATS89.1 = 0
ATS89.2 = 1
The DES request as well as any key distribution parameters, are exchanged via XID
frames in the same way as V.42bis negotiation. Interested users can use the embedded
protocol analyzer to examine the structure of XID frames. Both V.42bis and the data
encryption functions can be invoked simultaneously for an ISDN data call. But the DES
can not be used for bundle connections, due to the limitation of computing resources.
LED Indicators For Data Encryption
The B channel LED indicator (B1 or B2) lights up when the B channel is connected. A
single blinking LED indicates that data transmission is protected by Data Encryption
Standard (DES). A triple blinking LED indicates that data is protected by triple DES.
Description
DES is desired
DES is disabled (Default)
Triple DES is preferred
Single DES is preferred (Default)
Use a manually generated key
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