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5.9 Security Control
Your modem incorporates three levels of security: Level 1, Level 2 and
Dialback.
The commands involved are:
''E
Security control level
''Z Password store
''W Key store
S43=
Enable/disable dialback security
Level 1 and Level 2 Security
Level 1 security is used to activate security control between a central site
modem and a remote modem. The passwords and keys of both modems are
exchanged. If the passwords are identical on both modems, the link is
authenticated.
Level 2 security is used to activate security control where a modem is being
used in conjunction with a Network 16 Controller Card. Having validated
the passwords between the two modems, the answering modem then sends
it, along with the key, to the Controller Card for further validation before
the link is authenticated.
If the password (or key and password) is specified in the dial string using
<Ctrl-G>
or
<Ctrl-I>
, then that password will override the stored
password for a call made using that dial string.
Dialback Security
As the implementation of dial-up services increases, the security of those
services becomes a greater issue. This modem has addressed the issue by
providing dialback security on the modem.
Dialback security offers two distinct benefits to the user:
– A high level of security, achieved by only allowing users who are at pre-
determined locations to be connected.
– The ability to control all costs centrally by initiating the call from the
host site.
Using dialback security, the answering (central site) modem can verify
incoming calls against a list of passwords, and then dial the caller using
the number which is stored against the password.
X460-306851 Issue 1 5-12 Rev.0