General DataComm 060A027-001, Руководство по установке и эксплуатации

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Operation Security Overview
3-12 SpectraComm Dual V.34 Modem 060R122-000
Installation and Operation Issue 15
Online Password Security
The modem provides ten memory cells for storing cell passwords for Online Security. The
command for storing an online cell password is
%P
n
=
xxx, where n is the password cell number
(
0
through
9)
and xxx is the password. The cell password can be any string of up to ten characters.
Do not use commas in the cell password. The comma is reserved to identify the callback response
function.
Online Security with Pass-thru
Online Security with Pass-thru requires that the answering modem be a GDC modem, and optioned
for Online Security with the
%S2
command. When a caller initiates a call to an answer modem
that has Online Security enabled, the modems handshake then the caller receives the prompt:
ENTER PASSWORD
The operator has 20 seconds to respond with a valid cell password. When a cell password is
received, the modem compares it to the contents of all ten memory cells. With a match, the modem
admits the call directly. When an invalid cell password is entered, the modem disconnects the call.
Online Security with Callback
If the remote user initiating the call wants to use the Callback with Online Security, a callback phone
number must have previously been saved in the answering modem by means of the
&Zn=
nnn
command. Up to 10 phone numbers can be stored in cells 0 through 9 by means of the
&Z
command. You can view the stored phone numbers by using the
&V
command. Stored phone
numbers are used by the callback function, which is described below.
Online Security with Callback requires that an online cell password be configured with a callback
extension. A callback extension causes the answering modem to disconnect and then call back to
the modem that placed the original call. Use the
%F
n
=
x command to enable callback extension,
where
n
is the online password cell number and x defines if a callback is allowed or how the
password in that cell can be used for callback. The modem will use the phone number stored in the
cell number to call back the originating modem, to ask user for call back phone number, or to deny
any callback.
Callback Extensions
A remote operator can attach one of two callback request extensions to the online cell password
entry:
,R
(roving callback) or
,C
(cell callback).
With the roving callback extension ( ,R ) the answering modem prompts the caller for a telephone
number to use for the callback. Once the number is supplied, the answering modem disconnects the
original call and places a return call using the number it has just been given. The cell password and
its attached roving callback extension must have been stored in the answer modem with the
appropriate password cell qualifier:
%Fn=1 or %Fn=3 .
With the memory cell callback extension (
,C
) the answering modem prompts the caller for a phone
number memory cell (
0-9
) in the answering modem. Once the cell number is supplied, the
answering modem disconnects the original call and places a return call using the phone number
stored in that memory cell. The cell password and its attached memory cell callback extension must
have been stored in the answering modem with the proper password cell qualifier:
%Fn=2
or
%Fn=3
.
A cell password stored with cell qualifier
%Fn=0
will not accept any attached callback extension.