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Interconnect Signals
Table 3-4. Connector J2 Interconnect Signals (Continued)
Pin Number
3
A26
A27
A28
A29
A30
A31
A32
C1
C2
C3
3-12
Signal
Mnemonic
CTS4
CLEAR TO SEND (Serial Port 4) - CTS is a function
supplied to the terminal by the modem, and indicates
that it is permissible to begin transmission of a message.
When using a modem, CTS follows the off-to-on
transition of RTS after a time delay.
DCD4
DATA CARRIER DETECT (Serial Port 4) - sent by the
modem to the terminal to indicate that a valid carrier is
being received.
RTXC4
RECEIVE CLOCK (Serial Port 4) - this line can be
configured to clock input data from a terminal to a
modem.
TXD2
TRANSMIT DATA (Serial Port 2) - data to be
transmitted is furnished on this line to the modem from
the terminal.
RXD2
RECEIVE DATA (Serial Port 2) - data that is
demodulated from the receive line is presented to the
terminal by the modem.
RTS2
REQUEST TO SEND (Serial Port 2) - RTS is supplied by
the terminal to the modem when it is required to
transmit a message. With RTS off, the modem carrier
remains off. When RTS is turned on, the modem
immediately turns on the carrier.
DTR2
DATA TERMINAL READY (Serial Port 2) - a signal
from the terminal to the modem indicating that the
terminal is ready to send or receive data.
C+
COLLISION + (input) (Ethernet) - a signal to indicate
that multiple stations are contending for access to the
transmission medium.
T+
TRANSMIT + (output) (Ethernet) - this line is intended
to operate into terminated transmission lines.
R+
RECEIVE + (input) (Ethernet) - a data input sourced by
the MAU.
Signal Name and Description
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