Quatech MPAP-100 - Manual (Page 58)

CIRCUIT CC - DCE READY (DATA SET READY)
CONNECTOR NOTATION: DSR
DIRECTION: From DCE
This signal indicates the status of the local DCE by reporting to the DTE device that a
communication channel has been established.
CIRCUIT CD - DTE READY (DATA TERMINAL READY)
CONNECTOR NOTATION: DTR
DIRECTION: To DCE
This signal controls the switching of the DCE to the communication channel. The DTE
will generate this signal to prepare the DCE to be connected to or removed from the
communication channel.
CIRCUIT CE - RING INDICATOR
CONNECTOR NOTATION: RING
DIRECTION: From DCE
This signal indicates that a ringing signal is being received on the communication
channel.
CIRCUIT CF - RECEIVED LINE SIGNAL DETECT (CARRIER DETECT)
CONNECTOR NOTATION: CD
DIRECTION: From DCE
This signal indicates to the DTE whether the DCE is conditioned to receive data from the
communication channel, but does not indicate the relative quality of the data signals
being received.
CIRCUIT DA - TRANSMIT SIGNAL ELEMENT TIMING (DTE SOURCE)
CONNECTOR NOTATION: TXCLK (DTE)
DIRECTION: To DCE
This signal, generated by the DTE, provides the DCE with element timing information
pertaining to the data transmitted by the DTE. The DCE can use this information for its
received data.