10
ASYNC SHORT-HAUL MODEM MP
Control Input (Cin):
The Control Input signal is used by the local Async Short-Haul Modem MP as an
input signal to activate its transmitter (Enabled settings) and allow data
transmission to the remote device. This is required for half-duplex/switched-
carrier environments as well as in hardware flow-control applications. In the
Disabled settings, the Modem is always “turned on” and sends a continuous carrier
to the remote Modem.
Control Output (Cout):
The Control Output signal is transmitted by the local Modem to its attached DTE
device. This signal should be the same logic state as the Control Input signal on
the remote Modem. This signal is required in half-duplex/switched-carrier
environments or in hardware flow-control applications.
+Voltage Output (+Vout):
The +Voltage Output signal is a constant positive voltage that is sent from the
Modem to its attached DTE device.
Carrier Controlled by (Cin):
When Carrier Controlled by Control Input is Enabled, the Modem’s transmitter is
activated by the corresponding Cin Signal from the DTE. In effect, the Control
Input signal on the local Modem controls the presence of carrier and the Control
Output signal on the remote Modem. This setting is required in half-
duplex/switched-carrier environments or in hardware-flow-control applications.
When Carrier Control by Control Input is Disabled, the Modem sends a
continuous carrier and is always “turned on.”
