Led Indicators - Multitech MT5600ZDX Quick Start Manual

LED Indicators

The MultiModemZDX has ten LED indicators (Figure 2-3) to report MultiModemZDX
status (such as verifying proper installation) and line activity (such as monitoring the
status of a connection).
TD
Transmit Data. The TD LED flashes when data is being transmitted (on for a space,
off for a mark). Signals on this circuit are generated by the terminal and transferred to
the transmitter of the MultiModemZDX. The transmitting terminal should hold this line in
the marking state when no data is being transmitted, including intervals between
characters or words. The TRANSMIT (TD) LED indicates the status of this circuit.
RD
Receive Data. The RD LED flashes when data is being received (on for a space,
off for a mark). Data signals received from the remote MultiModemZDX are
presented on this line. When no carrier signal is being received (pin 8 negative), this
line will be forced into a marking condition. The RECEIVE (RD) LED indicates the
status of this signal.
CD
Carrier Detect. This LED lights when a valid carrier signal from another modem is
detected.
56
56K. This LED is lit when connected to an ISP-type 56K server. The actual connection
speed is contingent upon server capabilities and line conditions.
Chapter 2 - Installation and Connection
Figure 2-3. MultiModemZDX Front Panel LEDs
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