Multi-Tech Systems MT5656ZDX - Manual (Page 13)

Chapter 3 – Operation
Multi-Tech Systems, Inc. MT5656ZDX User Guide 13
Chapter 3 - Operation
Like any modem, your Multi-Tech modem operates only under the control of a communications program, such
as the communications program included with your modem. It also operates under other general-purpose data
communication programs, such as Windows Terminal and HyperTerminal. For information on how to use the
modem with the communications program of your choice, please refer to the documentation provided with the
data communications program.
An experienced modem user can configure the program’s software to change the way the software interacts with
a modem and configure the modem to change the way it operates.
Front Panel
About the LED Indicators
The modem has ten LED indicators on the front panel that indicate status and activity:
TD Transmit Data
Flashes when the modem is transmitting data to another modem.
RD Receive Data
Flashes when the modem is receiving data from another modem.
CD Carrier Detect
Lights when the modem detects a valid carrier signal from another modem. It is on when the
modem is communicating with the other modem, and off when the link is broken.
OH Off-Hook
Lights when the modem is off-hook, which occurs when the modem is dialing, online, or
answering a call. The LED flashes when the modem pulse-dials.
TR Terminal Ready
Lights when a communication program is using the modem. It means the modem is ready for
an outgoing or incoming call. It goes off when the communication program disconnects the
serial port. When it goes off, a connected modem will disconnect.
Note: When you turn on the modem, the PWR indicator lights; and if a terminal program is running,
the TR indicator also lights.