Manual Mode Operations - Tandy DCM-7 Operation Manual

Tandy protocol mode operation
Manual mode operations
When operating in manual mode, you control the system by manually dial-
ing and answering the telephone. Manual mode (answer or originate) is useful
when you want to talk by telephone to a friend at a remote location, and
later exchange computer data without redialing.
Example 1. Manual answer mode
The phone rings and you answer by picking up the receiver. After talking
a while to your friend, you decide to exchange information by computer
(telecommunications) without breaking voice call:
1. Your friend selects to be the originating station, while you are the an-
swering station. Set up your Modem by entering:
Wake up!
M Select manual mode.
A Select answer mode.
2. Give your friend time to set up the originating modem.
3. Press
®.
The Modem transmits carrier tone. The carrier is the sound
you hear through the built-in speaker or when you pick up the receiver
while the Modem is in communication with another modem.
4. The answer station always issues the X command first. After hearing
the answer modem's carrier tone, the originate station sends the X com-
mand to complete the connection. The Modem goes on line, and you'll
see the CONNECT result code on the screen.
5. Hang up both handsets.
Be sure to keep 'quiet when the handset is OFF HOOK. Noise picked up could
cause errors in the data being passed by the modems.
Be careful when you hang up the telephone since slamming or dropping the
phone back on the hook while the modems are controlling the lines could
disrupt carrier long enough to start a loss;..of-carrier disconnect sequence.
To return to voice communications after transmitting data:
1. Carefully pick up the handset (both modem stations).
2. Type at the keyboard that you will be aborting carrier. For example,
you might signal your friend by typing:
THAT'S ALL! I AM ABORTING CARRIER.
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