ZyXEL ACCESSING INTERNET & INTRANET omni series Manual de usuario Pagina 105

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Security Functions 93
13 Security Functions
The omni provides security functions that may be enabled to prevent
unauthorized connections. Two types of security functions are
provided.
Security Types and Levels
Type 1 security is to be used when the remote TA is a ZyXEL ISDN
TA.
Type 2 security is to be used with non-ZyXEL remote TAs.
With a Type 1 connection, the dial-in (remote) TA will send in its
supervisor password for matching with the local omnis pre-stored
password list. With a Type 2 connection, the remote terminal will be
prompted to enter the password at the initial connection and the local
omni will match the entered password with the pre-stored password
list.
The two types of security are summarized in the table below:
Type 1 Security Type 2 Security
Remote (Calling)
Site
ZyXEL ISDN device
only.
Can be TA of any
brand.
Password Check
Automatic Interactive
Protocols
Supported
X.75, V.120 Any data protocol
AT Commands *G1 for Level 1
security
*G2 for Level 2
security
*G3 for Level 1
security
*G4 for Level 2
security
*G5 for Level 3
security
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