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A typical basic set-up
A typical basic set-up may appear thus:
ATSO=18D2&.C18Wes|
S0=1
The modem answers after receiving one ring
&D2
When the data terminal sends a message to the modem that it is
no longer in operation, the modem replaces the receiver and
reverts to command
mode (i.e. is now ready for the next
incoming call).
Many host programs require that the caller key in a password.
Following a number of failures to give the correct password, the
program assumes that the caller does not have legal access. It
subsequently sends "DTR OFF" to the modem. The &D2
ensures that the connection is broken off when this message is
received.
&C1
Following this command the modem will give continuous
messages to the terminal/computer on the state of the carrier
wave. Should the connection with the remote modem suddenly
be broken (something goes wrong or the caller breaks off the
dialogue), the host program will detect this and return to the
"awaiting new call" status.
&W
The commands are entered into a pre-assigned register set.
2. The first caller rings up. The modem lifts the receiver after one
ring and sends a message to the terminal (e.g CONNECT
9600). The host program is initiated and the dialogue can
begin.
3. The conversation is complete and the caller
e terminates the call, or
e does something illegal which causes the host program
to replace the receiver.
The program sends the "DTR OFF" message to the modem
and the connection is broken off.
4 Finally the system must be prepared for the next caller.
Normally the program will have used several other AT
commands in association with points 2 and 3 above.
+ r
pte
ey
The modem appends the contents of the pre-
ATZO
: |
ce
assigned storage (as defined under pomt 1)
es
"oo
""Tand is now clear for the next call
1 2-4
LZTR104006 R1.00
Zat 14.4/14.4-7 and 19.2/19.2-7
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