Black Box MD1276A, User Manual

Page: 58 / 289

Page 58
The connection speed of the modem is indicated by the Mode LEDs. Refer to the Modem
LED Display table; it shows the meaning of each combination of Mode LEDs.
•
Press the Talk/Data button to Data (this button is located next to the front panel Option
switches)
•
Raise the DTR signal on your computer
DTR must change from
“ low ” to “ high ” to commence dialling. Your modem dials the stored
telephone number zero. The OH and CD LEDs glow when the modem connects.
To hang up:
•
Have your computer lower the DTR signal, or press the Talk/Data button to Talk
Answering Calls in Dumb Mode
Your modem is able to answer incoming calls, automatically or by manual intervention.
Automatic Answering
Your modem is able to auto-answer incoming calls in Dumb mode. You do not need a telephone
handset to have your modem answer incoming calls.
•
Place front panel Option switch 4 in the Up position (select Smart mode)
•
Connect your modem to a personal computer
•
Run a communications program and enter
“ local mode ” or “ terminal mode ”
•
Type: ATBx <E>
where
“ x ” is a valid setting of the B command. The B command is used to set the
communications standard used by your modem.
•
Type: AT&D2&M0 <E>
or:
Type: AT&D2E0Q1&M1 <E>
Issue the &M0 command if you wish to use asynchronous communications; issue &M1 if
you wish to use synchronous communications.
•
Type: AT&W <E>
The modem set up is saved.
•
Place front panel Option switch 4 in the Down position (select Dumb mode)
•
Place front panel Option switch 6 in the Up position (select Answer mode)
•
Place front panel Option switch 3 in the Up position (allow autoanswering of incoming
calls)
If the &D2 command has been issued to the modem, DTR must be raised by your computer.
•
Press the Talk/Data button (located next to the front panel Option switches) to Data
Your modem answers incoming calls after the number of rings specified in S Register 0.